155232072 has 64 divisors (see below), whose sum is σ = 433944000. Its totient is φ = 51414912.

The previous prime is 155232061. The next prime is 155232079. The reversal of 155232072 is 270232551.

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

It is not an unprimeable number, because it can be changed into a prime (155232079) 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, 33004 + ... + 37412.

It is an arithmetic number, because the mean of its divisors is an integer number (6780375).

Almost surely, 2^155232072 is an apocalyptic number.

155232072 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 155232072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216972000).

155232072 is an abundant number, since it is smaller than the sum of its proper divisors (278711928).

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

155232072 is a wasteful number, since it uses less digits than its factorization.

155232072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587 (or 4577 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 155232072 is about 12459.2163477484. The cubic root of 155232072 is about 537.4364916492.

The spelling of 155232072 in words is "one hundred fifty-five million, two hundred thirty-two thousand, seventy-two".