131404034402 has 4 divisors (see below), whose sum is σ = 197106051606. Its totient is φ = 65702017200.

The previous prime is 131404034347. The next prime is 131404034441. The reversal of 131404034402 is 204430404131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204430404131 = 613 ⋅333491687.

It can be written as a sum of positive squares in only one way, i.e., 95463078841 + 35940955561 = 308971^2 + 189581^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32851008599 + ... + 32851008602.

Almost surely, 2^131404034402 is an apocalyptic number.

131404034402 is a deficient number, since it is larger than the sum of its proper divisors (65702017204).

131404034402 is an equidigital number, since it uses as much as digits as its factorization.

131404034402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65702017203.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 131404034402 its reverse (204430404131), we get a palindrome (335834438533).

The spelling of 131404034402 in words is "one hundred thirty-one billion, four hundred four million, thirty-four thousand, four hundred two".