215042810 has 16 divisors (see below), whose sum is σ = 387290376. Its totient is φ = 85969728.

The previous prime is 215042777. The next prime is 215042831. The reversal of 215042810 is 18240512.

It can be written as a sum of positive squares in 4 ways, for example, as 214358881 + 683929 = 14641^2 + 827^2 .

It is a super-2 number, since 2×215042810² = 92486820265392200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17564 + ... + 27176.

Almost surely, 2^215042810 is an apocalyptic number.

215042810 is a deficient number, since it is larger than the sum of its proper divisors (172247566).

215042810 is a wasteful number, since it uses less digits than its factorization.

215042810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11857.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 215042810 is about 14664.3380348381. The cubic root of 215042810 is about 599.1124005558.

The spelling of 215042810 in words is "two hundred fifteen million, forty-two thousand, eight hundred ten".