10391431 has 4 divisors (see below), whose sum is σ = 10403352. Its totient is φ = 10379512.

The previous prime is 10391419. The next prime is 10391441. The reversal of 10391431 is 13419301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10391431 - 2²³ = 2002823 is a prime.

It is a super-2 number, since 2×10391431² = 215963676455522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10391441) 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, 4540 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (2600838).

Almost surely, 2^10391431 is an apocalyptic number.

10391431 is a deficient number, since it is larger than the sum of its proper divisors (11921).

10391431 is an equidigital number, since it uses as much as digits as its factorization.

10391431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11920.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 10391431 is about 3223.5742584901. The cubic root of 10391431 is about 218.2186104883.

The spelling of 10391431 in words is "ten million, three hundred ninety-one thousand, four hundred thirty-one".