216452025 has 18 divisors (see below), whose sum is σ = 387690030. Its totient is φ = 115440960.

The previous prime is 216452003. The next prime is 216452039. The reversal of 216452025 is 520254612.

It can be written as a sum of positive squares in 3 ways, for example, as 97344 + 216354681 = 312^2 + 14709^2 .

It is not a de Polignac number, because 216452025 - 2⁵ = 216451993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216452025.

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 17 ways as a sum of consecutive naturals, for example, 480780 + ... + 481229.

It is an arithmetic number, because the mean of its divisors is an integer number (21538335).

Almost surely, 2^216452025 is an apocalyptic number.

216452025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216452025 is a deficient number, since it is larger than the sum of its proper divisors (171238005).

216452025 is a wasteful number, since it uses less digits than its factorization.

216452025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962025 (or 962017 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 216452025 is about 14712.3086223747. The cubic root of 216452025 is about 600.4182500438.

The spelling of 216452025 in words is "two hundred sixteen million, four hundred fifty-two thousand, twenty-five".