215136012 has 96 divisors (see below), whose sum is σ = 650406400. Its totient is φ = 53747712.

The previous prime is 215136011. The next prime is 215136023. The reversal of 215136012 is 210631512.

215136012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 215136012.

It is not an unprimeable number, because it can be changed into a prime (215136011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15564 + ... + 25932.

Almost surely, 2^215136012 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 215136012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325203200).

215136012 is an abundant number, since it is smaller than the sum of its proper divisors (435270388).

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

215136012 is a wasteful number, since it uses less digits than its factorization.

215136012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10415 (or 10413 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 215136012 is about 14667.5155360409. The cubic root of 215136012 is about 599.1989420975.

Adding to 215136012 its reverse (210631512), we get a palindrome (425767524).

The spelling of 215136012 in words is "two hundred fifteen million, one hundred thirty-six thousand, twelve".