215513650 has 48 divisors (see below), whose sum is σ = 442659168. Its totient is φ = 77408000.

The previous prime is 215513629. The next prime is 215513653. The reversal of 215513650 is 56315512.

215513650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215513650² = 92892266672645000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215513653) 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, 43290 + ... + 48010.

It is an arithmetic number, because the mean of its divisors is an integer number (9222066).

Almost surely, 2^215513650 is an apocalyptic number.

215513650 is an abundant number, since it is smaller than the sum of its proper divisors (227145518).

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

215513650 is a wasteful number, since it uses less digits than its factorization.

215513650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4827 (or 4822 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 215513650 is about 14680.3831693863. The cubic root of 215513650 is about 599.5493375162.

The spelling of 215513650 in words is "two hundred fifteen million, five hundred thirteen thousand, six hundred fifty".