22491153 has 48 divisors (see below), whose sum is σ = 36812880. Its totient is φ = 13160448.

The previous prime is 22491143. The next prime is 22491191. The reversal of 22491153 is 35119422.

22491153 is a `hidden beast` number, since 22 + 491 + 153 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 3932289 + 18558864 = 1983^2 + 4308^2 .

It is not a de Polignac number, because 22491153 - 2⁴ = 22491137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22491143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164101 + ... + 164237.

It is an arithmetic number, because the mean of its divisors is an integer number (766935).

Almost surely, 2^22491153 is an apocalyptic number.

It is an amenable number.

22491153 is a deficient number, since it is larger than the sum of its proper divisors (14321727).

22491153 is a wasteful number, since it uses less digits than its factorization.

22491153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 223 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 22491153 is about 4742.4838428823. The cubic root of 22491153 is about 282.2738022769.

The spelling of 22491153 in words is "twenty-two million, four hundred ninety-one thousand, one hundred fifty-three".