16623550 has 12 divisors (see below), whose sum is σ = 30919896. Its totient is φ = 6649400.

The previous prime is 16623539. The next prime is 16623553. The reversal of 16623550 is 5532661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16623553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166186 + ... + 166285.

It is an arithmetic number, because the mean of its divisors is an integer number (2576658).

Almost surely, 2^16623550 is an apocalyptic number.

16623550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16623550 is a deficient number, since it is larger than the sum of its proper divisors (14296346).

16623550 is a wasteful number, since it uses less digits than its factorization.

16623550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332483 (or 332478 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 16623550 is about 4077.1987932893. The cubic root of 16623550 is about 255.2160158546.

It can be divided in two parts, 166 and 23550, that added together give a square (23716 = 154²).

The spelling of 16623550 in words is "sixteen million, six hundred twenty-three thousand, five hundred fifty".