11315731 has 4 divisors (see below), whose sum is σ = 12932272. Its totient is φ = 9699192.

The previous prime is 11315699. The next prime is 11315741. The reversal of 11315731 is 13751311.

11315731 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 11315731 - 2⁵ = 11315699 is a prime.

It is a super-2 number, since 2×11315731² = 256091536128722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11315741) 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 3 ways as a sum of consecutive naturals, for example, 808260 + ... + 808273.

It is an arithmetic number, because the mean of its divisors is an integer number (3233068).

Almost surely, 2^11315731 is an apocalyptic number.

11315731 is a deficient number, since it is larger than the sum of its proper divisors (1616541).

11315731 is an equidigital number, since it uses as much as digits as its factorization.

11315731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616540.

The product of its digits is 315, while the sum is 22.

The square root of 11315731 is about 3363.8862941544. The cubic root of 11315731 is about 224.5057860325.

The spelling of 11315731 in words is "eleven million, three hundred fifteen thousand, seven hundred thirty-one".