22551515 has 24 divisors (see below), whose sum is σ = 31888080. Its totient is φ = 15263808.

The previous prime is 22551491. The next prime is 22551533. The reversal of 22551515 is 51515522.

It is not a de Polignac number, because 22551515 - 2¹⁴ = 22535131 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19781 + ... + 20889.

It is an arithmetic number, because the mean of its divisors is an integer number (1328670).

Almost surely, 2^22551515 is an apocalyptic number.

22551515 is a deficient number, since it is larger than the sum of its proper divisors (9336565).

22551515 is a wasteful number, since it uses less digits than its factorization.

22551515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211 (or 1204 counting only the distinct ones).

The product of its digits is 2500, while the sum is 26.

The square root of 22551515 is about 4748.8435434324. The cubic root of 22551515 is about 282.5260998675.

The spelling of 22551515 in words is "twenty-two million, five hundred fifty-one thousand, five hundred fifteen".