22425591 has 4 divisors (see below), whose sum is σ = 29900792. Its totient is φ = 14950392.

The previous prime is 22425587. The next prime is 22425593. The reversal of 22425591 is 19552422.

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

It is not a de Polignac number, because 22425591 - 2² = 22425587 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 (22425593) 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 3 ways as a sum of consecutive naturals, for example, 3737596 + ... + 3737601.

It is an arithmetic number, because the mean of its divisors is an integer number (7475198).

Almost surely, 2^22425591 is an apocalyptic number.

22425591 is a deficient number, since it is larger than the sum of its proper divisors (7475201).

22425591 is an equidigital number, since it uses as much as digits as its factorization.

22425591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7475200.

The product of its digits is 7200, while the sum is 30.

The square root of 22425591 is about 4735.5665975678. The cubic root of 22425591 is about 281.9992580837. Note that the first 3 decimals are identical.

The spelling of 22425591 in words is "twenty-two million, four hundred twenty-five thousand, five hundred ninety-one".