215388458532 has 120 divisors (see below), whose sum is σ = 607868353400. Its totient is φ = 66110805504.

The previous prime is 215388458507. The next prime is 215388458539. The reversal of 215388458532 is 235854883512.

It is a happy number.

215388458532 is a `hidden beast` number, since 2 + 1 + 53 + 8 + 8 + 4 + 58 + 532 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 43574892516 + 171813566016 = 208746^2 + 414504^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (215388458539) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1660194 + ... + 1785222.

Almost surely, 2^215388458532 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 215388458532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303934176700).

215388458532 is an abundant number, since it is smaller than the sum of its proper divisors (392479894868).

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

215388458532 is a wasteful number, since it uses less digits than its factorization.

215388458532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125467 (or 125456 counting only the distinct ones).

The product of its digits is 9216000, while the sum is 54.

The spelling of 215388458532 in words is "two hundred fifteen billion, three hundred eighty-eight million, four hundred fifty-eight thousand, five hundred thirty-two".