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155241240 = 233571153317
BaseRepresentation
bin10010100000011…
…00101100011000
3101211010001221120
421100030230120
5304220204430
623223205240
73563346240
oct1120145430
9354101846
10155241240
117a6a2050
1243ba6820
132621572b
1416890b20
15d967610
hex940cb18

155241240 has 256 divisors, whose sum is σ = 593464320. Its totient is φ = 31549440.

The previous prime is 155241239. The next prime is 155241253. The reversal of 155241240 is 42142551.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 155241240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 489562 + ... + 489878.

It is an arithmetic number, because the mean of its divisors is an integer number (2318220).

Almost surely, 2155241240 is an apocalyptic number.

155241240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155241240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296732160).

155241240 is an abundant number, since it is smaller than the sum of its proper divisors (438223080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155241240 is a wasteful number, since it uses less digits than its factorization.

155241240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 155241240 is about 12459.5842627272. The cubic root of 155241240 is about 537.4470717668.

Adding to 155241240 its reverse (42142551), we get a palindrome (197383791).

The spelling of 155241240 in words is "one hundred fifty-five million, two hundred forty-one thousand, two hundred forty".