16915625 has 12 divisors (see below), whose sum is σ = 21147084. Its totient is φ = 13530000.

The previous prime is 16915621. The next prime is 16915627. The reversal of 16915625 is 52651961.

It can be written as a sum of positive squares in 6 ways, for example, as 15618304 + 1297321 = 3952^2 + 1139^2 .

It is not a de Polignac number, because 16915625 - 2² = 16915621 is a prime.

It is a super-2 number, since 2×16915625² = 572276738281250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16915621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 419 + ... + 5831.

It is an arithmetic number, because the mean of its divisors is an integer number (1762257).

Almost surely, 2^16915625 is an apocalyptic number.

It is an amenable number.

16915625 is a deficient number, since it is larger than the sum of its proper divisors (4231459).

16915625 is an frugal number, since it uses more digits than its factorization.

16915625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5438 (or 5418 counting only the distinct ones).

The product of its digits is 16200, while the sum is 35.

The square root of 16915625 is about 4112.8609264112. The cubic root of 16915625 is about 256.7020574875.

It can be divided in two parts, 169 and 15625, that multiplied together give a square (2640625 = 1625²).

The spelling of 16915625 in words is "sixteen million, nine hundred fifteen thousand, six hundred twenty-five".