215601072 has 120 divisors (see below), whose sum is σ = 609242256. Its totient is φ = 65470464.

The previous prime is 215601013. The next prime is 215601073. The reversal of 215601072 is 270106512.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (215601073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1117008 + ... + 1117200.

Almost surely, 2^215601072 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 215601072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304621128).

215601072 is an abundant number, since it is smaller than the sum of its proper divisors (393641184).

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

215601072 is a wasteful number, since it uses less digits than its factorization.

215601072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 215601072 is about 14683.3603783330. The cubic root of 215601072 is about 599.6303945887.

Adding to 215601072 its reverse (270106512), we get a palindrome (485707584).

The spelling of 215601072 in words is "two hundred fifteen million, six hundred one thousand, seventy-two".