215212552 has 8 divisors (see below), whose sum is σ = 403523550. Its totient is φ = 107606272.

The previous prime is 215212531. The next prime is 215212603. The reversal of 215212552 is 255212512.

It can be written as a sum of positive squares in only one way, i.e., 118504996 + 96707556 = 10886^2 + 9834^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13450777 + ... + 13450792.

Almost surely, 2^215212552 is an apocalyptic number.

It is an amenable number.

215212552 is a deficient number, since it is larger than the sum of its proper divisors (188310998).

215212552 is a wasteful number, since it uses less digits than its factorization.

215212552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26901575 (or 26901571 counting only the distinct ones).

The product of its digits is 2000, while the sum is 25.

The square root of 215212552 is about 14670.1244711829. The cubic root of 215212552 is about 599.2699936596.

The spelling of 215212552 in words is "two hundred fifteen million, two hundred twelve thousand, five hundred fifty-two".