215490364 has 12 divisors (see below), whose sum is σ = 377685000. Its totient is φ = 107580368.

The previous prime is 215490349. The next prime is 215490377. The reversal of 215490364 is 463094512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38239 + ... + 43510.

It is an arithmetic number, because the mean of its divisors is an integer number (31473750).

Almost surely, 2^215490364 is an apocalyptic number.

It is an amenable number.

215490364 is a deficient number, since it is larger than the sum of its proper divisors (162194636).

215490364 is a wasteful number, since it uses less digits than its factorization.

215490364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82412 (or 82410 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 215490364 is about 14679.5900487718. The cubic root of 215490364 is about 599.5277432015.

The spelling of 215490364 in words is "two hundred fifteen million, four hundred ninety thousand, three hundred sixty-four".