22540057 has 4 divisors (see below), whose sum is σ = 22559796. Its totient is φ = 22520320.

The previous prime is 22540031. The next prime is 22540081. The reversal of 22540057 is 75004522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75004522 = 2 ⋅37502261.

It can be written as a sum of positive squares in 2 ways, for example, as 17106496 + 5433561 = 4136^2 + 2331^2 .

It is a cyclic number.

It is not a de Polignac number, because 22540057 - 2⁷ = 22539929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22540027) 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, 8044 + ... + 10477.

It is an arithmetic number, because the mean of its divisors is an integer number (5639949).

Almost surely, 2^22540057 is an apocalyptic number.

It is an amenable number.

22540057 is a deficient number, since it is larger than the sum of its proper divisors (19739).

22540057 is a wasteful number, since it uses less digits than its factorization.

22540057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19738.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 22540057 is about 4747.6369911778. The cubic root of 22540057 is about 282.4782430316.

Adding to 22540057 its reverse (75004522), we get a palindrome (97544579).

The spelling of 22540057 in words is "twenty-two million, five hundred forty thousand, fifty-seven".