155252531 has 12 divisors (see below), whose sum is σ = 183078072. Its totient is φ = 131247648.

The previous prime is 155252521. The next prime is 155252533. The reversal of 155252531 is 135252551.

155252531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-155252531 is a prime.

It is a super-2 number, since 2×155252531² = 48206696763811922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155252494 and 155252503.

It is not an unprimeable number, because it can be changed into a prime (155252533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18125 + ... + 25278.

It is an arithmetic number, because the mean of its divisors is an integer number (15256506).

Almost surely, 2^155252531 is an apocalyptic number.

155252531 is a deficient number, since it is larger than the sum of its proper divisors (27825541).

155252531 is an equidigital number, since it uses as much as digits as its factorization.

155252531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43490 (or 43483 counting only the distinct ones).

The product of its digits is 7500, while the sum is 29.

The square root of 155252531 is about 12460.0373594946. The cubic root of 155252531 is about 537.4601013110.

The spelling of 155252531 in words is "one hundred fifty-five million, two hundred fifty-two thousand, five hundred thirty-one".