215482568401 has 3 divisors (see below), whose sum is σ = 215483032603. Its totient is φ = 215482104200.

The previous prime is 215482568377. The next prime is 215482568407. The reversal of 215482568401 is 104865284512.

The square root of 215482568401 is 464201.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 202275962001 + 13206606400 = 449751^2 + 114920^2 .

It is not a de Polignac number, because 215482568401 - 2²¹ = 215480471249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215482568407) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 232101 + ... + 696301.

Almost surely, 2^215482568401 is an apocalyptic number.

215482568401 is the 464201-st square number.

215482568401 is the 232101-st centered octagonal number.

It is an amenable number.

215482568401 is a deficient number, since it is larger than the sum of its proper divisors (464202).

215482568401 is an frugal number, since it uses more digits than its factorization.

215482568401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928402 (or 464201 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 215482568401 in words is "two hundred fifteen billion, four hundred eighty-two million, five hundred sixty-eight thousand, four hundred one".