11621831 has 16 divisors (see below), whose sum is σ = 13353984. Its totient is φ = 10030944.

The previous prime is 11621809. The next prime is 11621839. The reversal of 11621831 is 13812611.

It is a de Polignac number, because none of the positive numbers 2^k-11621831 is a prime.

It is a super-2 number, since 2×11621831² = 270133911585122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 11621797 and 11621806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13640 + ... + 14466.

It is an arithmetic number, because the mean of its divisors is an integer number (834624).

Almost surely, 2^11621831 is an apocalyptic number.

11621831 is a deficient number, since it is larger than the sum of its proper divisors (1732153).

11621831 is a wasteful number, since it uses less digits than its factorization.

11621831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910.

The product of its digits is 288, while the sum is 23.

The square root of 11621831 is about 3409.0806678634. The cubic root of 11621831 is about 226.5121584956.

The spelling of 11621831 in words is "eleven million, six hundred twenty-one thousand, eight hundred thirty-one".