131515434 has 32 divisors (see below), whose sum is σ = 309450240. Its totient is φ = 41259456.

The previous prime is 131515421. The next prime is 131515441. The reversal of 131515434 is 434515131.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 131515398 and 131515407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70714 + ... + 72549.

It is an arithmetic number, because the mean of its divisors is an integer number (9670320).

Almost surely, 2^131515434 is an apocalyptic number.

131515434 is an abundant number, since it is smaller than the sum of its proper divisors (177934806).

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

131515434 is a wasteful number, since it uses less digits than its factorization.

131515434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143291 (or 143285 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 131515434 is about 11468.0178758145. The cubic root of 131515434 is about 508.5405333114.

The spelling of 131515434 in words is "one hundred thirty-one million, five hundred fifteen thousand, four hundred thirty-four".