215020965 has 16 divisors (see below), whose sum is σ = 344285568. Its totient is φ = 114593856.

The previous prime is 215020943. The next prime is 215020987. The reversal of 215020965 is 569020512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (215020943) and next prime (215020987).

It is not a de Polignac number, because 215020965 - 2⁶ = 215020901 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19752 + ... + 28638.

It is an arithmetic number, because the mean of its divisors is an integer number (21517848).

Almost surely, 2^215020965 is an apocalyptic number.

It is an amenable number.

215020965 is a deficient number, since it is larger than the sum of its proper divisors (129264603).

215020965 is a wasteful number, since it uses less digits than its factorization.

215020965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10508.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 215020965 is about 14663.5931817546. The cubic root of 215020965 is about 599.0921130395.

The spelling of 215020965 in words is "two hundred fifteen million, twenty thousand, nine hundred sixty-five".