22491275 has 12 divisors (see below), whose sum is σ = 28789824. Its totient is φ = 17412000.

The previous prime is 22491253. The next prime is 22491283. The reversal of 22491275 is 57219422.

It is not a de Polignac number, because 22491275 - 2⁸ = 22491019 is a prime.

It is a super-2 number, since 2×22491275² = 1011714902251250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13736 + ... + 15285.

It is an arithmetic number, because the mean of its divisors is an integer number (2399152).

Almost surely, 2^22491275 is an apocalyptic number.

22491275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22491275 is a deficient number, since it is larger than the sum of its proper divisors (6298549).

22491275 is a wasteful number, since it uses less digits than its factorization.

22491275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29062 (or 29057 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 22491275 is about 4742.4967053231. The cubic root of 22491275 is about 282.2743126604.

The spelling of 22491275 in words is "twenty-two million, four hundred ninety-one thousand, two hundred seventy-five".