131891210 has 24 divisors (see below), whose sum is σ = 260950788. Its totient is φ = 47960000.

The previous prime is 131891209. The next prime is 131891231. The reversal of 131891210 is 12198131.

131891210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 130119649 + 1771561 = 11407^2 + 1331^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131891210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53291 + ... + 55710.

Almost surely, 2^131891210 is an apocalyptic number.

131891210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131891210 is a deficient number, since it is larger than the sum of its proper divisors (129059578).

131891210 is a wasteful number, since it uses less digits than its factorization.

131891210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109030 (or 109019 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 131891210 is about 11484.3898401265. The cubic root of 131891210 is about 509.0244197624.

The spelling of 131891210 in words is "one hundred thirty-one million, eight hundred ninety-one thousand, two hundred ten".