215142268 has 24 divisors (see below), whose sum is σ = 411384960. Its totient is φ = 97635120.

The previous prime is 215142251. The next prime is 215142313. The reversal of 215142268 is 862241512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26473 + ... + 33631.

It is an arithmetic number, because the mean of its divisors is an integer number (17141040).

Almost surely, 2^215142268 is an apocalyptic number.

It is an amenable number.

215142268 is a deficient number, since it is larger than the sum of its proper divisors (196242692).

215142268 is a wasteful number, since it uses less digits than its factorization.

215142268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7857 (or 7855 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 215142268 is about 14667.7287948748. The cubic root of 215142268 is about 599.2047501321.

The spelling of 215142268 in words is "two hundred fifteen million, one hundred forty-two thousand, two hundred sixty-eight".