131918910 has 32 divisors (see below), whose sum is σ = 317481120. Its totient is φ = 35081088.

The previous prime is 131918887. The next prime is 131918921. The reversal of 131918910 is 19819131.

It is a happy number.

It is a congruent number.

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, 5296 + ... + 17084.

It is an arithmetic number, because the mean of its divisors is an integer number (9921285).

Almost surely, 2^131918910 is an apocalyptic number.

131918910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131918910 is an abundant number, since it is smaller than the sum of its proper divisors (185562210).

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

131918910 is a wasteful number, since it uses less digits than its factorization.

131918910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12172.

The product of its (nonzero) digits is 1944, while the sum is 33.

The square root of 131918910 is about 11485.5957616486. The cubic root of 131918910 is about 509.0600526385.

The spelling of 131918910 in words is "one hundred thirty-one million, nine hundred eighteen thousand, nine hundred ten".