215249364 has 72 divisors (see below), whose sum is σ = 619399872. Its totient is φ = 62388480.

The previous prime is 215249327. The next prime is 215249369. The reversal of 215249364 is 463942512.

It is a happy number.

215249364 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 (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215249369) 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, 2709 + ... + 20924.

It is an arithmetic number, because the mean of its divisors is an integer number (8602776).

Almost surely, 2^215249364 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 215249364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309699936).

215249364 is an abundant number, since it is smaller than the sum of its proper divisors (404150508).

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

215249364 is a wasteful number, since it uses less digits than its factorization.

215249364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23677 (or 23672 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 215249364 is about 14671.3790762832. The cubic root of 215249364 is about 599.3041599898.

The spelling of 215249364 in words is "two hundred fifteen million, two hundred forty-nine thousand, three hundred sixty-four".