16731625 has 8 divisors (see below), whose sum is σ = 20881224. Its totient is φ = 13385200.

The previous prime is 16731619. The next prime is 16731641. The reversal of 16731625 is 52613761.

It can be written as a sum of positive squares in 4 ways, for example, as 19881 + 16711744 = 141^2 + 4088^2 .

It is not a de Polignac number, because 16731625 - 2⁵ = 16731593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 66802 + ... + 67051.

It is an arithmetic number, because the mean of its divisors is an integer number (2610153).

Almost surely, 2^16731625 is an apocalyptic number.

It is an amenable number.

16731625 is a deficient number, since it is larger than the sum of its proper divisors (4149599).

16731625 is an equidigital number, since it uses as much as digits as its factorization.

16731625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133868 (or 133858 counting only the distinct ones).

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

The square root of 16731625 is about 4090.4309063960. The cubic root of 16731625 is about 255.7679018182.

The spelling of 16731625 in words is "sixteen million, seven hundred thirty-one thousand, six hundred twenty-five".