22661550 has 36 divisors (see below), whose sum is σ = 60885240. Its totient is φ = 6042960.

The previous prime is 22661543. The next prime is 22661591. The reversal of 22661550 is 5516622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 24730 + ... + 25629.

Almost surely, 2^22661550 is an apocalyptic number.

22661550 is an abundant number, since it is smaller than the sum of its proper divisors (38223690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22661550 is a wasteful number, since it uses less digits than its factorization.

22661550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50377 (or 50369 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 22661550 is about 4760.4148978844. The cubic root of 22661550 is about 282.9848618639.

It can be divided in two parts, 226 and 61550, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 22661550 in words is "twenty-two million, six hundred sixty-one thousand, five hundred fifty".