131631902 has 4 divisors (see below), whose sum is σ = 197447856. Its totient is φ = 65815950.

The previous prime is 131631893. The next prime is 131631923. The reversal of 131631902 is 209136131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 209136131 = 1531 ⋅136601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32907974 + ... + 32907977.

It is an arithmetic number, because the mean of its divisors is an integer number (49361964).

Almost surely, 2^131631902 is an apocalyptic number.

131631902 is a deficient number, since it is larger than the sum of its proper divisors (65815954).

131631902 is an equidigital number, since it uses as much as digits as its factorization.

131631902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65815953.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 131631902 is about 11473.0947002106. The cubic root of 131631902 is about 508.6906075185.

The spelling of 131631902 in words is "one hundred thirty-one million, six hundred thirty-one thousand, nine hundred two".