16531250 has 42 divisors (see below), whose sum is σ = 32401929. Its totient is φ = 6325000.

The previous prime is 16531231. The next prime is 16531261. The reversal of 16531250 is 5213561.

It can be written as a sum of positive squares in 4 ways, for example, as 2819041 + 13712209 = 1679^2 + 3703^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2875.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 718739 + ... + 718761.

Almost surely, 2^16531250 is an apocalyptic number.

16531250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16531250 is a deficient number, since it is larger than the sum of its proper divisors (15870679).

16531250 is an frugal number, since it uses more digits than its factorization.

16531250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 16531250 is about 4065.8639918226. The cubic root of 16531250 is about 254.7427881902.

The spelling of 16531250 in words is "sixteen million, five hundred thirty-one thousand, two hundred fifty".