215280670 has 16 divisors (see below), whose sum is σ = 422733168. Its totient is φ = 78283840.

The previous prime is 215280649. The next prime is 215280691. The reversal of 215280670 is 76082512.

It is an interprime number because it is at equal distance from previous prime (215280649) and next prime (215280691).

It is a congruent number.

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, 978439 + ... + 978658.

It is an arithmetic number, because the mean of its divisors is an integer number (26420823).

Almost surely, 2^215280670 is an apocalyptic number.

215280670 is a deficient number, since it is larger than the sum of its proper divisors (207452498).

215280670 is a wasteful number, since it uses less digits than its factorization.

215280670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957115.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 215280670 is about 14672.4459446951. The cubic root of 215280670 is about 599.3332129700. Note that the first 3 decimals are identical.

The spelling of 215280670 in words is "two hundred fifteen million, two hundred eighty thousand, six hundred seventy".