155131328 has 28 divisors (see below), whose sum is σ = 335825592. Its totient is φ = 70513920.

The previous prime is 155131313. The next prime is 155131337. The reversal of 155131328 is 823131551.

It is a happy number.

155131328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 155131328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109475 + ... + 110882.

Almost surely, 2^155131328 is an apocalyptic number.

It is an amenable number.

155131328 is an abundant number, since it is smaller than the sum of its proper divisors (180694264).

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

155131328 is a wasteful number, since it uses less digits than its factorization.

155131328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220380 (or 220370 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 155131328 is about 12455.1727406728. The cubic root of 155131328 is about 537.3202029246.

Adding to 155131328 its reverse (823131551), we get a palindrome (978262879).

The spelling of 155131328 in words is "one hundred fifty-five million, one hundred thirty-one thousand, three hundred twenty-eight".