22159451 has 12 divisors (see below), whose sum is σ = 23814720. Its totient is φ = 20573280.

The previous prime is 22159447. The next prime is 22159481. The reversal of 22159451 is 15495122.

It is not a de Polignac number, because 22159451 - 2² = 22159447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22159481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141065 + ... + 141221.

It is an arithmetic number, because the mean of its divisors is an integer number (1984560).

Almost surely, 2^22159451 is an apocalyptic number.

22159451 is a deficient number, since it is larger than the sum of its proper divisors (1655269).

22159451 is an equidigital number, since it uses as much as digits as its factorization.

22159451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 217 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 22159451 is about 4707.3826060774. The cubic root of 22159451 is about 280.8792556304.

The spelling of 22159451 in words is "twenty-two million, one hundred fifty-nine thousand, four hundred fifty-one".