23155550 has 24 divisors (see below), whose sum is σ = 46985832. Its totient is φ = 8420000.

The previous prime is 23155523. The next prime is 23155567. The reversal of 23155550 is 5555132.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20501 + ... + 21600.

It is an arithmetic number, because the mean of its divisors is an integer number (1957743).

Almost surely, 2^23155550 is an apocalyptic number.

23155550 is an abundant number, since it is smaller than the sum of its proper divisors (23830282).

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

23155550 is a wasteful number, since it uses less digits than its factorization.

23155550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42124 (or 42119 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 23155550 is about 4812.0214047737. The cubic root of 23155550 is about 285.0263646483.

The spelling of 23155550 in words is "twenty-three million, one hundred fifty-five thousand, five hundred fifty".