155139300 has 180 divisors, whose sum is σ = 510436080. Its totient is φ = 40754880.

The previous prime is 155139293. The next prime is 155139329. The reversal of 155139300 is 3931551.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 866611 + ... + 866789.

It is an arithmetic number, because the mean of its divisors is an integer number (2835756).

Almost surely, 2^155139300 is an apocalyptic number.

155139300 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 155139300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255218040).

155139300 is an abundant number, since it is smaller than the sum of its proper divisors (355296780).

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

155139300 is a wasteful number, since it uses less digits than its factorization.

155139300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 27.

The square root of 155139300 is about 12455.4927642386. The cubic root of 155139300 is about 537.3294068323.

It can be divided in two parts, 15 and 5139300, that added together give a palindrome (5139315).

The spelling of 155139300 in words is "one hundred fifty-five million, one hundred thirty-nine thousand, three hundred".