215472312 has 320 divisors, whose sum is σ = 728323200. Its totient is φ = 58786560.

The previous prime is 215472287. The next prime is 215472317. The reversal of 215472312 is 213274512.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215472317) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5010963 + ... + 5011005.

It is an arithmetic number, because the mean of its divisors is an integer number (2276010).

Almost surely, 2^215472312 is an apocalyptic number.

215472312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215472312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (364161600).

215472312 is an abundant number, since it is smaller than the sum of its proper divisors (512850888).

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

215472312 is a wasteful number, since it uses less digits than its factorization.

215472312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 115 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 215472312 is about 14678.9751685872. The cubic root of 215472312 is about 599.5110015758.

The spelling of 215472312 in words is "two hundred fifteen million, four hundred seventy-two thousand, three hundred twelve".