131891442 has 16 divisors (see below), whose sum is σ = 265242432. Its totient is φ = 43720560.

The previous prime is 131891437. The next prime is 131891467. The reversal of 131891442 is 244198131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59638 + ... + 61809.

It is an arithmetic number, because the mean of its divisors is an integer number (16577652).

Almost surely, 2^131891442 is an apocalyptic number.

131891442 is an abundant number, since it is smaller than the sum of its proper divisors (133350990).

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

131891442 is a wasteful number, since it uses less digits than its factorization.

131891442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121633.

The product of its digits is 6912, while the sum is 33.

The square root of 131891442 is about 11484.3999407892. The cubic root of 131891442 is about 509.0247182245.

The spelling of 131891442 in words is "one hundred thirty-one million, eight hundred ninety-one thousand, four hundred forty-two".