22765487 has 4 divisors (see below), whose sum is σ = 22777560. Its totient is φ = 22753416.

The previous prime is 22765459. The next prime is 22765507. The reversal of 22765487 is 78456722.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22765487 - 2⁸ = 22765231 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 (22765417) 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, 2528 + ... + 7205.

It is an arithmetic number, because the mean of its divisors is an integer number (5694390).

Almost surely, 2^22765487 is an apocalyptic number.

22765487 is a deficient number, since it is larger than the sum of its proper divisors (12073).

22765487 is an equidigital number, since it uses as much as digits as its factorization.

22765487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12072.

The product of its digits is 188160, while the sum is 41.

The square root of 22765487 is about 4771.3192096107. The cubic root of 22765487 is about 283.4168379782.

The spelling of 22765487 in words is "twenty-two million, seven hundred sixty-five thousand, four hundred eighty-seven".