215247090 has 32 divisors (see below), whose sum is σ = 518576256. Its totient is φ = 57178880.

The previous prime is 215247083. The next prime is 215247091. The reversal of 215247090 is 90742512.

215247090 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 (30).

It is not an unprimeable number, because it can be changed into a prime (215247091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5751 + ... + 21530.

It is an arithmetic number, because the mean of its divisors is an integer number (16205508).

Almost surely, 2^215247090 is an apocalyptic number.

215247090 is an abundant number, since it is smaller than the sum of its proper divisors (303329166).

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

215247090 is a wasteful number, since it uses less digits than its factorization.

215247090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27554.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 215247090 is about 14671.3015782513. The cubic root of 215247090 is about 599.3020495345.

The spelling of 215247090 in words is "two hundred fifteen million, two hundred forty-seven thousand, ninety".