215156512 has 12 divisors (see below), whose sum is σ = 423589446. Its totient is φ = 107578240.

The previous prime is 215156507. The next prime is 215156519. The reversal of 215156512 is 215651512.

It can be written as a sum of positive squares in only one way, i.e., 196112016 + 19044496 = 14004^2 + 4364^2 .

It is a super-2 number, since 2×215156512² = 92584649312012288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215156519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3361789 + ... + 3361852.

Almost surely, 2^215156512 is an apocalyptic number.

It is an amenable number.

215156512 is a deficient number, since it is larger than the sum of its proper divisors (208432934).

215156512 is an equidigital number, since it uses as much as digits as its factorization.

215156512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6723651 (or 6723643 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

The square root of 215156512 is about 14668.2143425844. The cubic root of 215156512 is about 599.2179737604.

The spelling of 215156512 in words is "two hundred fifteen million, one hundred fifty-six thousand, five hundred twelve".