31131401 has 8 divisors (see below), whose sum is σ = 35664384. Its totient is φ = 26619840.

The previous prime is 31131379. The next prime is 31131407. The reversal of 31131401 is 10413113.

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 31131401 - 2⁶ = 31131337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31131407) 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, 2105 + ... + 8166.

It is an arithmetic number, because the mean of its divisors is an integer number (4458048).

Almost surely, 2^31131401 is an apocalyptic number.

It is an amenable number.

31131401 is a deficient number, since it is larger than the sum of its proper divisors (4532983).

31131401 is a wasteful number, since it uses less digits than its factorization.

31131401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10711.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 31131401 is about 5579.5520429511. The cubic root of 31131401 is about 314.5812896534.

Adding to 31131401 its reverse (10413113), we get a palindrome (41544514).

The spelling of 31131401 in words is "thirty-one million, one hundred thirty-one thousand, four hundred one".