22125831 has 16 divisors (see below), whose sum is σ = 36309504. Its totient is φ = 11670624.

The previous prime is 22125821. The next prime is 22125841. The reversal of 22125831 is 13852122.

It is an interprime number because it is at equal distance from previous prime (22125821) and next prime (22125841).

It is not a de Polignac number, because 22125831 - 2⁵ = 22125799 is a prime.

It is a super-2 number, since 2×22125831² = 979104794881122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22125821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40251 + ... + 40796.

It is an arithmetic number, because the mean of its divisors is an integer number (2269344).

Almost surely, 2^22125831 is an apocalyptic number.

22125831 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22125831 is a deficient number, since it is larger than the sum of its proper divisors (14183673).

22125831 is a wasteful number, since it uses less digits than its factorization.

22125831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81070.

The product of its digits is 960, while the sum is 24.

The square root of 22125831 is about 4703.8102640306. The cubic root of 22125831 is about 280.7371350776.

Adding to 22125831 its reverse (13852122), we get a palindrome (35977953).

The spelling of 22125831 in words is "twenty-two million, one hundred twenty-five thousand, eight hundred thirty-one".