22557001 has 2 divisors, whose sum is σ = 22557002. Its totient is φ = 22557000.

The previous prime is 22556999. The next prime is 22557019. The reversal of 22557001 is 10075522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22467600 + 89401 = 4740^2 + 299^2 .

It is a cyclic number.

It is not a de Polignac number, because 22557001 - 2¹ = 22556999 is a prime.

It is a super-2 number, since 2×22557001² = 1017636588228002, which contains 22 as substring.

Together with 22556999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22557061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11278500 + 11278501.

It is an arithmetic number, because the mean of its divisors is an integer number (11278501).

Almost surely, 2^22557001 is an apocalyptic number.

It is an amenable number.

22557001 is a deficient number, since it is larger than the sum of its proper divisors (1).

22557001 is an equidigital number, since it uses as much as digits as its factorization.

22557001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 22557001 is about 4749.4211226212. The cubic root of 22557001 is about 282.5490076045.

The spelling of 22557001 in words is "twenty-two million, five hundred fifty-seven thousand, one".