22601557 has 4 divisors (see below), whose sum is σ = 24656256. Its totient is φ = 20546860.

The previous prime is 22601549. The next prime is 22601567. The reversal of 22601557 is 75510622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22601557 - 2³ = 22601549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22601567) 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, 1027333 + ... + 1027354.

It is an arithmetic number, because the mean of its divisors is an integer number (6164064).

Almost surely, 2^22601557 is an apocalyptic number.

It is an amenable number.

22601557 is a deficient number, since it is larger than the sum of its proper divisors (2054699).

22601557 is a wasteful number, since it uses less digits than its factorization.

22601557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054698.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 22601557 is about 4754.1094854873. The cubic root of 22601557 is about 282.7349214092.

The spelling of 22601557 in words is "twenty-two million, six hundred one thousand, five hundred fifty-seven".