22257645 has 32 divisors (see below), whose sum is σ = 38793600. Its totient is φ = 10854144.

The previous prime is 22257643. The next prime is 22257671. The reversal of 22257645 is 54675222.

It is not a de Polignac number, because 22257645 - 2¹ = 22257643 is a prime.

It is a super-3 number, since 3×22257645³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22257643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6919 + ... + 9611.

It is an arithmetic number, because the mean of its divisors is an integer number (1212300).

Almost surely, 2^22257645 is an apocalyptic number.

It is an amenable number.

22257645 is a deficient number, since it is larger than the sum of its proper divisors (16535955).

22257645 is a wasteful number, since it uses less digits than its factorization.

22257645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749.

The product of its digits is 33600, while the sum is 33.

The square root of 22257645 is about 4717.8008648098. The cubic root of 22257645 is about 281.2935261031.

It can be divided in two parts, 2225 and 7645, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 22257645 in words is "twenty-two million, two hundred fifty-seven thousand, six hundred forty-five".