131312440442 has 8 divisors (see below), whose sum is σ = 199666861716. Its totient is φ = 64756819872.

The previous prime is 131312440429. The next prime is 131312440529. The reversal of 131312440442 is 244044213131.

It can be written as a sum of positive squares in 2 ways, for example, as 128363841841 + 2948598601 = 358279^2 + 54301^2 .

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, 449699993 + ... + 449700284.

Almost surely, 2^131312440442 is an apocalyptic number.

131312440442 is a deficient number, since it is larger than the sum of its proper divisors (68354421274).

131312440442 is an equidigital number, since it uses as much as digits as its factorization.

131312440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899400352.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 131312440442 its reverse (244044213131), we get a palindrome (375356653573).

The spelling of 131312440442 in words is "one hundred thirty-one billion, three hundred twelve million, four hundred forty thousand, four hundred forty-two".