10815631 has 2 divisors, whose sum is σ = 10815632. Its totient is φ = 10815630.

The previous prime is 10815619. The next prime is 10815641. The reversal of 10815631 is 13651801.

10815631 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10815631 - 2⁵ = 10815599 is a prime.

It is a super-2 number, since 2×10815631² = 233955747856322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10815596 and 10815605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10815601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5407815 + 5407816.

It is an arithmetic number, because the mean of its divisors is an integer number (5407816).

Almost surely, 2^10815631 is an apocalyptic number.

10815631 is a deficient number, since it is larger than the sum of its proper divisors (1).

10815631 is an equidigital number, since it uses as much as digits as its factorization.

10815631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 10815631 is about 3288.7126660747. The cubic root of 10815631 is about 221.1484775803.

The spelling of 10815631 in words is "ten million, eight hundred fifteen thousand, six hundred thirty-one".