22551715 has 4 divisors (see below), whose sum is σ = 27062064. Its totient is φ = 18041368.

The previous prime is 22551713. The next prime is 22551719. The reversal of 22551715 is 51715522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51715522 = 2 ⋅25857761.

It is a cyclic number.

It is not a de Polignac number, because 22551715 - 2¹ = 22551713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22551713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2255167 + ... + 2255176.

It is an arithmetic number, because the mean of its divisors is an integer number (6765516).

Almost surely, 2^22551715 is an apocalyptic number.

22551715 is a deficient number, since it is larger than the sum of its proper divisors (4510349).

22551715 is an equidigital number, since it uses as much as digits as its factorization.

22551715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510348.

The product of its digits is 3500, while the sum is 28.

The square root of 22551715 is about 4748.8646011442. The cubic root of 22551715 is about 282.5269350672.

The spelling of 22551715 in words is "twenty-two million, five hundred fifty-one thousand, seven hundred fifteen".