215214056 has 8 divisors (see below), whose sum is σ = 403526370. Its totient is φ = 107607024.

The previous prime is 215214053. The next prime is 215214127. The reversal of 215214056 is 650412512.

It can be written as a sum of positive squares in only one way, i.e., 215091556 + 122500 = 14666^2 + 350^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×215214056² = 92634179799942272, which contains 22 as substring.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (215214053) by changing a digit.

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 as a sum of consecutive naturals, namely, 13450871 + ... + 13450886.

Almost surely, 2^215214056 is an apocalyptic number.

It is an amenable number.

215214056 is a deficient number, since it is larger than the sum of its proper divisors (188312314).

215214056 is a wasteful number, since it uses less digits than its factorization.

215214056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26901763 (or 26901759 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 215214056 is about 14670.1757317355. The cubic root of 215214056 is about 599.2713896438.

Adding to 215214056 its reverse (650412512), we get a palindrome (865626568).

The spelling of 215214056 in words is "two hundred fifteen million, two hundred fourteen thousand, fifty-six".