22856551 has 4 divisors (see below), whose sum is σ = 24201072. Its totient is φ = 21512032.

The previous prime is 22856539. The next prime is 22856567. The reversal of 22856551 is 15565822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15565822 = 2 ⋅7782911.

It is a cyclic number.

It is not a de Polignac number, because 22856551 - 2⁹ = 22856039 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 (22856851) 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, 672235 + ... + 672268.

It is an arithmetic number, because the mean of its divisors is an integer number (6050268).

Almost surely, 2^22856551 is an apocalyptic number.

22856551 is a deficient number, since it is larger than the sum of its proper divisors (1344521).

22856551 is a wasteful number, since it uses less digits than its factorization.

22856551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344520.

The product of its digits is 24000, while the sum is 34.

The square root of 22856551 is about 4780.8525390353. The cubic root of 22856551 is about 283.7942328528.

It can be divided in two parts, 2285 and 6551, that added together give a square (8836 = 94²).

The spelling of 22856551 in words is "twenty-two million, eight hundred fifty-six thousand, five hundred fifty-one".