131310111402 has 24 divisors (see below), whose sum is σ = 284515828740. Its totient is φ = 43768408320.

The previous prime is 131310111341. The next prime is 131310111487. The reversal of 131310111402 is 204111013131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 99219330081 + 32090781321 = 314991^2 + 179139^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423724 + ... + 664952.

Almost surely, 2^131310111402 is an apocalyptic number.

131310111402 is an abundant number, since it is smaller than the sum of its proper divisors (153205717338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131310111402 is a wasteful number, since it uses less digits than its factorization.

131310111402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271478 (or 271475 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 131310111402 its reverse (204111013131), we get a palindrome (335421124533).

The spelling of 131310111402 in words is "one hundred thirty-one billion, three hundred ten million, one hundred eleven thousand, four hundred two".