22457207 has 4 divisors (see below), whose sum is σ = 22574976. Its totient is φ = 22339440.

The previous prime is 22457189. The next prime is 22457219. The reversal of 22457207 is 70275422.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22457207 - 2²² = 18262903 is a prime.

It is a super-2 number, since 2×22457207² = 1008652292481698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22457207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22457807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58598 + ... + 58979.

It is an arithmetic number, because the mean of its divisors is an integer number (5643744).

Almost surely, 2^22457207 is an apocalyptic number.

22457207 is a deficient number, since it is larger than the sum of its proper divisors (117769).

22457207 is a wasteful number, since it uses less digits than its factorization.

22457207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117768.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 22457207 is about 4738.9035651720. The cubic root of 22457207 is about 282.1317183904.

The spelling of 22457207 in words is "twenty-two million, four hundred fifty-seven thousand, two hundred seven".