131231401 has 8 divisors (see below), whose sum is σ = 154817024. Its totient is φ = 108855360.

The previous prime is 131231393. The next prime is 131231411. The reversal of 131231401 is 104132131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131231401 - 2³ = 131231393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131231411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302160 + ... + 302593.

It is an arithmetic number, because the mean of its divisors is an integer number (19352128).

Almost surely, 2^131231401 is an apocalyptic number.

It is an amenable number.

131231401 is a deficient number, since it is larger than the sum of its proper divisors (23585623).

131231401 is an equidigital number, since it uses as much as digits as its factorization.

131231401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604791.

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

The square root of 131231401 is about 11455.6274817227. The cubic root of 131231401 is about 508.1741722502.

Adding to 131231401 its reverse (104132131), we get a palindrome (235363532).

The spelling of 131231401 in words is "one hundred thirty-one million, two hundred thirty-one thousand, four hundred one".