22512643 has 2 divisors, whose sum is σ = 22512644. Its totient is φ = 22512642.

The previous prime is 22512631. The next prime is 22512661. The reversal of 22512643 is 34621522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22512643 - 2²¹ = 20415491 is a prime.

It is not a weakly prime, because it can be changed into another prime (22512673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11256321 + 11256322.

It is an arithmetic number, because the mean of its divisors is an integer number (11256322).

Almost surely, 2^22512643 is an apocalyptic number.

22512643 is a deficient number, since it is larger than the sum of its proper divisors (1).

22512643 is an equidigital number, since it uses as much as digits as its factorization.

22512643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 22512643 is about 4744.7489923072. The cubic root of 22512643 is about 282.3636766232.

The spelling of 22512643 in words is "twenty-two million, five hundred twelve thousand, six hundred forty-three".