15631401 has 16 divisors (see below), whose sum is σ = 21657600. Its totient is φ = 10021008.

The previous prime is 15631397. The next prime is 15631411. The reversal of 15631401 is 10413651.

It is not a de Polignac number, because 15631401 - 2² = 15631397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15631411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7380 + ... + 9258.

It is an arithmetic number, because the mean of its divisors is an integer number (1353600).

Almost surely, 2^15631401 is an apocalyptic number.

It is an amenable number.

15631401 is a deficient number, since it is larger than the sum of its proper divisors (6026199).

15631401 is a wasteful number, since it uses less digits than its factorization.

15631401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 15631401 is about 3953.6566618764. The cubic root of 15631401 is about 250.0341340059.

The spelling of 15631401 in words is "fifteen million, six hundred thirty-one thousand, four hundred one".