217713380315490 has 48 divisors (see below), whose sum is σ = 571247952046200. Its totient is φ = 57524269291776.

The previous prime is 217713380315489. The next prime is 217713380315609. The reversal of 217713380315490 is 94513083317712.

217713380315490 is a `hidden beast` number, since 2 + 1 + 7 + 7 + 13 + 3 + 80 + 3 + 1 + 549 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 197688014864649 + 20025365450841 = 14060157^2 + 4474971^2 .

It is a super-2 number, since 2×217713380315490² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11096492755 + ... + 11096512374.

Almost surely, 2^{217713380315490} is an apocalyptic number.

217713380315490 is an abundant number, since it is smaller than the sum of its proper divisors (353534571730710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217713380315490 is a wasteful number, since it uses less digits than its factorization.

217713380315490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22193005251 (or 22193005248 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 217713380315490 in words is "two hundred seventeen trillion, seven hundred thirteen billion, three hundred eighty million, three hundred fifteen thousand, four hundred ninety".