215320104 has 24 divisors (see below), whose sum is σ = 583158810. Its totient is φ = 71773344.

The previous prime is 215320097. The next prime is 215320123. The reversal of 215320104 is 401023512.

It can be written as a sum of positive squares in only one way, i.e., 211702500 + 3617604 = 14550^2 + 1902^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1495207 + ... + 1495350.

Almost surely, 2^215320104 is an apocalyptic number.

215320104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

215320104 is an abundant number, since it is smaller than the sum of its proper divisors (367838706).

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

215320104 is a wasteful number, since it uses less digits than its factorization.

215320104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990569 (or 2990562 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 215320104 is about 14673.7896945540. The cubic root of 215320104 is about 599.3698049888.

Adding to 215320104 its reverse (401023512), we get a palindrome (616343616).

The spelling of 215320104 in words is "two hundred fifteen million, three hundred twenty thousand, one hundred four".