215492109 has 8 divisors (see below), whose sum is σ = 328368960. Its totient is φ = 123138336.

The previous prime is 215492093. The next prime is 215492111. The reversal of 215492109 is 901294512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215492109 - 2⁴ = 215492093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215492109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215492149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5130744 + ... + 5130785.

It is an arithmetic number, because the mean of its divisors is an integer number (41046120).

Almost surely, 2^215492109 is an apocalyptic number.

It is an amenable number.

215492109 is a deficient number, since it is larger than the sum of its proper divisors (112876851).

215492109 is a wasteful number, since it uses less digits than its factorization.

215492109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10261539.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 215492109 is about 14679.6494849162. The cubic root of 215492109 is about 599.5293614844.

The spelling of 215492109 in words is "two hundred fifteen million, four hundred ninety-two thousand, one hundred nine".