131915916 has 144 divisors (see below), whose sum is σ = 381308928. Its totient is φ = 38102400.

The previous prime is 131915897. The next prime is 131915921. The reversal of 131915916 is 619519131.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1038645 + ... + 1038771.

Almost surely, 2^131915916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131915916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190654464).

131915916 is an abundant number, since it is smaller than the sum of its proper divisors (249393012).

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

131915916 is a wasteful number, since it uses less digits than its factorization.

131915916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 247 counting only the distinct ones).

The product of its digits is 7290, while the sum is 36.

The square root of 131915916 is about 11485.4654237432. The cubic root of 131915916 is about 509.0562014410.

The spelling of 131915916 in words is "one hundred thirty-one million, nine hundred fifteen thousand, nine hundred sixteen".