215269164 has 270 divisors, whose sum is σ = 691677140. Its totient is φ = 58164480.

The previous prime is 215269157. The next prime is 215269169. The reversal of 215269164 is 461962512.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (215269169) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 11329947 + ... + 11329965.

Almost surely, 2^215269164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215269164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345838570).

215269164 is an abundant number, since it is smaller than the sum of its proper divisors (476407976).

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

215269164 is a wasteful number, since it uses less digits than its factorization.

215269164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 52 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 215269164 is about 14672.0538439579. The cubic root of 215269164 is about 599.3225353573.

The spelling of 215269164 in words is "two hundred fifteen million, two hundred sixty-nine thousand, one hundred sixty-four".