16531825 has 12 divisors (see below), whose sum is σ = 21391488. Its totient is φ = 12650000.

The previous prime is 16531819. The next prime is 16531829. The reversal of 16531825 is 52813561.

16531825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16531825 - 2⁹ = 16531313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16531829) 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, 13801 + ... + 14950.

It is an arithmetic number, because the mean of its divisors is an integer number (1782624).

Almost surely, 2^16531825 is an apocalyptic number.

It is an amenable number.

16531825 is a deficient number, since it is larger than the sum of its proper divisors (4859663).

16531825 is a wasteful number, since it uses less digits than its factorization.

16531825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28784 (or 28779 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 16531825 is about 4065.9347018859. The cubic root of 16531825 is about 254.7457416956.

The spelling of 16531825 in words is "sixteen million, five hundred thirty-one thousand, eight hundred twenty-five".