131312402 has 8 divisors (see below), whose sum is σ = 212120076. Its totient is φ = 60605712.

The previous prime is 131312399. The next prime is 131312413. The reversal of 131312402 is 204213131.

It can be written as a sum of positive squares in 2 ways, for example, as 131308681 + 3721 = 11459^2 + 61^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525213 + ... + 2525264.

Almost surely, 2^131312402 is an apocalyptic number.

131312402 is a deficient number, since it is larger than the sum of its proper divisors (80807674).

131312402 is a wasteful number, since it uses less digits than its factorization.

131312402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050492.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 131312402 is about 11459.1623603124. The cubic root of 131312402 is about 508.2787055394.

Adding to 131312402 its reverse (204213131), we get a palindrome (335525533).

The spelling of 131312402 in words is "one hundred thirty-one million, three hundred twelve thousand, four hundred two".