215140775 has 12 divisors (see below), whose sum is σ = 275381184. Its totient is φ = 166560000.

The previous prime is 215140769. The next prime is 215140789. The reversal of 215140775 is 577041512.

It is not a de Polignac number, because 215140775 - 2⁴ = 215140759 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138026 + ... + 139575.

It is an arithmetic number, because the mean of its divisors is an integer number (22948432).

Almost surely, 2^215140775 is an apocalyptic number.

215140775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

215140775 is a deficient number, since it is larger than the sum of its proper divisors (60240409).

215140775 is a wasteful number, since it uses less digits than its factorization.

215140775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277642 (or 277637 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 215140775 is about 14667.6779007449. The cubic root of 215140775 is about 599.2033640497.

The spelling of 215140775 in words is "two hundred fifteen million, one hundred forty thousand, seven hundred seventy-five".