217428229264 has 45 divisors (see below), whose sum is σ = 431451089139. Its totient is φ = 106146710880.

The previous prime is 217428229231. The next prime is 217428229283. The reversal of 217428229264 is 462922824712.

The square root of 217428229264 is 466292.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 80200869 + ... + 80203579.

Almost surely, 2^217428229264 is an apocalyptic number.

217428229264 is the 466292-nd square number.

It is an amenable number.

217428229264 is a deficient number, since it is larger than the sum of its proper divisors (214022859875).

217428229264 is an frugal number, since it uses more digits than its factorization.

217428229264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5516 (or 2756 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 49.

Multiplying 217428229264 by its sum of digits (49), we get a square (10653983233936 = 3264044²).

The spelling of 217428229264 in words is "two hundred seventeen billion, four hundred twenty-eight million, two hundred twenty-nine thousand, two hundred sixty-four".