16531025 has 12 divisors (see below), whose sum is σ = 23427072. Its totient is φ = 11335440.

The previous prime is 16530989. The next prime is 16531037. The reversal of 16531025 is 52013561.

It is not a de Polignac number, because 16531025 - 2⁶ = 16530961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47057 + ... + 47406.

It is an arithmetic number, because the mean of its divisors is an integer number (1952256).

Almost surely, 2^16531025 is an apocalyptic number.

It is an amenable number.

16531025 is a deficient number, since it is larger than the sum of its proper divisors (6896047).

16531025 is an equidigital number, since it uses as much as digits as its factorization.

16531025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94480 (or 94475 counting only the distinct ones).

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

The square root of 16531025 is about 4065.8363223327. The cubic root of 16531025 is about 254.7416324521.

Adding to 16531025 its reverse (52013561), we get a palindrome (68544586).

The spelling of 16531025 in words is "sixteen million, five hundred thirty-one thousand, twenty-five".