22718651 has 4 divisors (see below), whose sum is σ = 23038704. Its totient is φ = 22398600.

The previous prime is 22718621. The next prime is 22718653. The reversal of 22718651 is 15681722.

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

It is a cyclic number.

It is not a de Polignac number, because 22718651 - 2⁶ = 22718587 is a prime.

It is a super-2 number, since 2×22718651² = 1032274206519602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22718653) 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, 159920 + ... + 160061.

It is an arithmetic number, because the mean of its divisors is an integer number (5759676).

Almost surely, 2^22718651 is an apocalyptic number.

22718651 is a deficient number, since it is larger than the sum of its proper divisors (320053).

22718651 is an equidigital number, since it uses as much as digits as its factorization.

22718651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320052.

The product of its digits is 6720, while the sum is 32.

The square root of 22718651 is about 4766.4086060681. The cubic root of 22718651 is about 283.2223443793. Note that the first 3 decimals are identical.

The spelling of 22718651 in words is "twenty-two million, seven hundred eighteen thousand, six hundred fifty-one".