217145430580 has 48 divisors (see below), whose sum is σ = 494949611520. Its totient is φ = 79545449088.

The previous prime is 217145430563. The next prime is 217145430613. The reversal of 217145430580 is 85034541712.

It is a super-3 number, since 3×217145430580³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3255070 + ... + 3321109.

It is an arithmetic number, because the mean of its divisors is an integer number (10311450240).

Almost surely, 2^217145430580 is an apocalyptic number.

217145430580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217145430580 is an abundant number, since it is smaller than the sum of its proper divisors (277804180940).

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

217145430580 is a wasteful number, since it uses less digits than its factorization.

217145430580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6576328 (or 6576326 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 217145430580 in words is "two hundred seventeen billion, one hundred forty-five million, four hundred thirty thousand, five hundred eighty".