215425228832 has 54 divisors (see below), whose sum is σ = 466242257439. Its totient is φ = 97907430720.

The previous prime is 215425228813. The next prime is 215425228867. The reversal of 215425228832 is 238822524512.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 107712614416 + 107712614416 = 328196^2 + 328196^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=328196.

It is a super-3 number, since 3×215425228832³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 28877519 + ... + 28884977.

Almost surely, 2^215425228832 is an apocalyptic number.

215425228832 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 215425228832

215425228832 is an abundant number, since it is smaller than the sum of its proper divisors (250817028607).

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

215425228832 is an frugal number, since it uses more digits than its factorization.

215425228832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14950 (or 7472 counting only the distinct ones).

The product of its digits is 614400, while the sum is 44.

The spelling of 215425228832 in words is "two hundred fifteen billion, four hundred twenty-five million, two hundred twenty-eight thousand, eight hundred thirty-two".