22961515 has 4 divisors (see below), whose sum is σ = 27553824. Its totient is φ = 18369208.

The previous prime is 22961501. The next prime is 22961539. The reversal of 22961515 is 51516922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51516922 = 2 ⋅25758461.

It is a cyclic number.

It is not a de Polignac number, because 22961515 - 2⁷ = 22961387 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2296147 + ... + 2296156.

It is an arithmetic number, because the mean of its divisors is an integer number (6888456).

Almost surely, 2^22961515 is an apocalyptic number.

22961515 is a deficient number, since it is larger than the sum of its proper divisors (4592309).

22961515 is an equidigital number, since it uses as much as digits as its factorization.

22961515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592308.

The product of its digits is 5400, while the sum is 31.

The square root of 22961515 is about 4791.8175048722. The cubic root of 22961515 is about 284.2279917220.

The spelling of 22961515 in words is "twenty-two million, nine hundred sixty-one thousand, five hundred fifteen".