215317490 has 32 divisors (see below), whose sum is σ = 406218240. Its totient is φ = 82016704.

The previous prime is 215317471. The next prime is 215317499. The reversal of 215317490 is 94713512.

It is not an unprimeable number, because it can be changed into a prime (215317499) 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, 53012 + ... + 56928.

It is an arithmetic number, because the mean of its divisors is an integer number (12694320).

Almost surely, 2^215317490 is an apocalyptic number.

215317490 is a deficient number, since it is larger than the sum of its proper divisors (190900750).

215317490 is a wasteful number, since it uses less digits than its factorization.

215317490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 215317490 is about 14673.7006239053. The cubic root of 215317490 is about 599.3673795163.

The spelling of 215317490 in words is "two hundred fifteen million, three hundred seventeen thousand, four hundred ninety".