131555028 has 24 divisors (see below), whose sum is σ = 334867680. Its totient is φ = 39865120.

The previous prime is 131555023. The next prime is 131555029. The reversal of 131555028 is 820555131.

It is a junction number, because it is equal to n+sod(n) for n = 131554986 and 131555004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131555023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498183 + ... + 498446.

It is an arithmetic number, because the mean of its divisors is an integer number (13952820).

Almost surely, 2^131555028 is an apocalyptic number.

It is an amenable number.

131555028 is an abundant number, since it is smaller than the sum of its proper divisors (203312652).

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

131555028 is a wasteful number, since it uses less digits than its factorization.

131555028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996647 (or 996645 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 131555028 is about 11469.7440250426. The cubic root of 131555028 is about 508.5915618814.

The spelling of 131555028 in words is "one hundred thirty-one million, five hundred fifty-five thousand, twenty-eight".