16631725 has 24 divisors (see below), whose sum is σ = 22686048. Its totient is φ = 11995200.

The previous prime is 16631723. The next prime is 16631731. The reversal of 16631725 is 52713661.

It is not a de Polignac number, because 16631725 - 2¹ = 16631723 is a prime.

It is a super-2 number, since 2×16631725² = 553228552951250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16631723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54022 + ... + 54328.

It is an arithmetic number, because the mean of its divisors is an integer number (945252).

Almost surely, 2^16631725 is an apocalyptic number.

It is an amenable number.

16631725 is a deficient number, since it is larger than the sum of its proper divisors (6054323).

16631725 is a wasteful number, since it uses less digits than its factorization.

16631725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 520 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 16631725 is about 4078.2011966062. The cubic root of 16631725 is about 255.2578450470.

The spelling of 16631725 in words is "sixteen million, six hundred thirty-one thousand, seven hundred twenty-five".