155057232 has 80 divisors (see below), whose sum is σ = 448846272. Its totient is φ = 45711360.

The previous prime is 155057213. The next prime is 155057239. The reversal of 155057232 is 232750551.

It is a self number, because there is not a number n which added to its sum of digits gives 155057232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155057239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15568 + ... + 23504.

Almost surely, 2^155057232 is an apocalyptic number.

155057232 is a gapful number since it is divisible by the number (12) 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 155057232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224423136).

155057232 is an abundant number, since it is smaller than the sum of its proper divisors (293789040).

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

155057232 is a wasteful number, since it uses less digits than its factorization.

155057232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7996 (or 7990 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 155057232 is about 12452.1978782864. The cubic root of 155057232 is about 537.2346418311.

The spelling of 155057232 in words is "one hundred fifty-five million, fifty-seven thousand, two hundred thirty-two".