131311402 has 8 divisors (see below), whose sum is σ = 197413056. Its totient is φ = 65507052.

The previous prime is 131311361. The next prime is 131311423. The reversal of 131311402 is 204113131.

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, 73218 + ... + 74989.

It is an arithmetic number, because the mean of its divisors is an integer number (24676632).

Almost surely, 2^131311402 is an apocalyptic number.

131311402 is a deficient number, since it is larger than the sum of its proper divisors (66101654).

131311402 is a wasteful number, since it uses less digits than its factorization.

131311402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148652.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 131311402 is about 11459.1187270226. The cubic root of 131311402 is about 508.2774152830.

Adding to 131311402 its reverse (204113131), we get a palindrome (335424533).

The spelling of 131311402 in words is "one hundred thirty-one million, three hundred eleven thousand, four hundred two".