155251140 has 192 divisors, whose sum is σ = 510789888. Its totient is φ = 34816000.

The previous prime is 155251139. The next prime is 155251153. The reversal of 155251140 is 41152551.

It is a self number, because there is not a number n which added to its sum of digits gives 155251140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1133152 + ... + 1133288.

It is an arithmetic number, because the mean of its divisors is an integer number (2660364).

Almost surely, 2^155251140 is an apocalyptic number.

155251140 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 155251140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255394944).

155251140 is an abundant number, since it is smaller than the sum of its proper divisors (355538748).

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

155251140 is a wasteful number, since it uses less digits than its factorization.

155251140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 155251140 is about 12459.9815409173. The cubic root of 155251140 is about 537.4584961643.

It can be divided in two parts, 1552511 and 40, that added together give a palindrome (1552551).

The spelling of 155251140 in words is "one hundred fifty-five million, two hundred fifty-one thousand, one hundred forty".