131945402 has 4 divisors (see below), whose sum is σ = 197918106. Its totient is φ = 65972700.

The previous prime is 131945327. The next prime is 131945413. The reversal of 131945402 is 204549131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 80263681 + 51681721 = 8959^2 + 7189^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32986349 + ... + 32986352.

Almost surely, 2^131945402 is an apocalyptic number.

131945402 is a deficient number, since it is larger than the sum of its proper divisors (65972704).

131945402 is an equidigital number, since it uses as much as digits as its factorization.

131945402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65972703.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 131945402 is about 11486.7489743617. The cubic root of 131945402 is about 509.0941268949.

The spelling of 131945402 in words is "one hundred thirty-one million, nine hundred forty-five thousand, four hundred two".