217297583452 has 24 divisors (see below), whose sum is σ = 381738420000. Its totient is φ = 108229578816.

The previous prime is 217297583441. The next prime is 217297583491. The reversal of 217297583452 is 254385792712.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 217297583393 and 217297583402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13789674 + ... + 13805422.

It is an arithmetic number, because the mean of its divisors is an integer number (15905767500).

Almost surely, 2^217297583452 is an apocalyptic number.

It is an amenable number.

217297583452 is a deficient number, since it is larger than the sum of its proper divisors (164440836548).

217297583452 is a wasteful number, since it uses less digits than its factorization.

217297583452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28845 (or 28843 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 55.

The spelling of 217297583452 in words is "two hundred seventeen billion, two hundred ninety-seven million, five hundred eighty-three thousand, four hundred fifty-two".