216525460 has 12 divisors (see below), whose sum is σ = 454703508. Its totient is φ = 86610176.

The previous prime is 216525433. The next prime is 216525461. The reversal of 216525460 is 64525612.

216525460 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 165173904 + 51351556 = 12852^2 + 7166^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216525461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5413117 + ... + 5413156.

It is an arithmetic number, because the mean of its divisors is an integer number (37891959).

Almost surely, 2^216525460 is an apocalyptic number.

216525460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216525460 is an abundant number, since it is smaller than the sum of its proper divisors (238178048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216525460 is a wasteful number, since it uses less digits than its factorization.

216525460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10826282 (or 10826280 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 216525460 is about 14714.8041101470. The cubic root of 216525460 is about 600.4861430389.

The spelling of 216525460 in words is "two hundred sixteen million, five hundred twenty-five thousand, four hundred sixty".