31320401 has 8 divisors (see below), whose sum is σ = 36024000. Its totient is φ = 26674128.

The previous prime is 31320391. The next prime is 31320413. The reversal of 31320401 is 10402313.

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 31320401 - 2⁶ = 31320337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31320451) 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, 13151 + ... + 15348.

It is an arithmetic number, because the mean of its divisors is an integer number (4503000).

Almost surely, 2^31320401 is an apocalyptic number.

It is an amenable number.

31320401 is a deficient number, since it is larger than the sum of its proper divisors (4703599).

31320401 is a wasteful number, since it uses less digits than its factorization.

31320401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28663.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31320401 is about 5596.4632581658. The cubic root of 31320401 is about 315.2166176112.

Adding to 31320401 its reverse (10402313), we get a palindrome (41722714).

The spelling of 31320401 in words is "thirty-one million, three hundred twenty thousand, four hundred one".