216464325 has 48 divisors (see below), whose sum is σ = 446209536. Its totient is φ = 89956800.

The previous prime is 216464291. The next prime is 216464329. The reversal of 216464325 is 523464612.

It is not a de Polignac number, because 216464325 - 2⁷ = 216464197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216464329) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12967 + ... + 24516.

It is an arithmetic number, because the mean of its divisors is an integer number (9296032).

Almost surely, 2^216464325 is an apocalyptic number.

216464325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216464325 is an abundant number, since it is smaller than the sum of its proper divisors (229745211).

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

216464325 is a wasteful number, since it uses less digits than its factorization.

216464325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37514 (or 37509 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 216464325 is about 14712.7266337685. The cubic root of 216464325 is about 600.4296228558.

The spelling of 216464325 in words is "two hundred sixteen million, four hundred sixty-four thousand, three hundred twenty-five".