31912401 has 4 divisors (see below), whose sum is σ = 42549872. Its totient is φ = 21274932.

The previous prime is 31912367. The next prime is 31912403. The reversal of 31912401 is 10421913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31912401 - 2⁶ = 31912337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31912403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5318731 + ... + 5318736.

It is an arithmetic number, because the mean of its divisors is an integer number (10637468).

Almost surely, 2^31912401 is an apocalyptic number.

It is an amenable number.

31912401 is a deficient number, since it is larger than the sum of its proper divisors (10637471).

31912401 is a wasteful number, since it uses less digits than its factorization.

31912401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10637470.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 31912401 is about 5649.1062124906. The cubic root of 31912401 is about 317.1902482601.

It can be divided in two parts, 319 and 12401, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 31912401 in words is "thirty-one million, nine hundred twelve thousand, four hundred one".