22785513 has 16 divisors (see below), whose sum is σ = 31248000. Its totient is φ = 14762880.

The previous prime is 22785509. The next prime is 22785517. The reversal of 22785513 is 31558722.

It is an interprime number because it is at equal distance from previous prime (22785509) and next prime (22785517).

It is not a de Polignac number, because 22785513 - 2² = 22785509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22785517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15588 + ... + 16986.

It is an arithmetic number, because the mean of its divisors is an integer number (1953000).

Almost surely, 2^22785513 is an apocalyptic number.

It is an amenable number.

22785513 is a deficient number, since it is larger than the sum of its proper divisors (8462487).

22785513 is a wasteful number, since it uses less digits than its factorization.

22785513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552.

The product of its digits is 16800, while the sum is 33.

The square root of 22785513 is about 4773.4173293355. The cubic root of 22785513 is about 283.4999175710.

The spelling of 22785513 in words is "twenty-two million, seven hundred eighty-five thousand, five hundred thirteen".