216372258 has 12 divisors (see below), whose sum is σ = 468806598. Its totient is φ = 72124080.

The previous prime is 216372251. The next prime is 216372269. The reversal of 216372258 is 852273612.

It can be written as a sum of positive squares in only one way, i.e., 213539769 + 2832489 = 14613^2 + 1683^2 .

It is not an unprimeable number, because it can be changed into a prime (216372251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6010323 + ... + 6010358.

Almost surely, 2^216372258 is an apocalyptic number.

216372258 is an abundant number, since it is smaller than the sum of its proper divisors (252434340).

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

216372258 is a wasteful number, since it uses less digits than its factorization.

216372258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12020689 (or 12020686 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 216372258 is about 14709.5974791970. The cubic root of 216372258 is about 600.3444855117.

The spelling of 216372258 in words is "two hundred sixteen million, three hundred seventy-two thousand, two hundred fifty-eight".