217120451500 has 48 divisors (see below), whose sum is σ = 475716136896. Its totient is φ = 86568864000.

The previous prime is 217120451497. The next prime is 217120451501. The reversal of 217120451500 is 5154021712.

217120451500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (217120451501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 542637 + ... + 853636.

It is an arithmetic number, because the mean of its divisors is an integer number (9910752852).

Almost surely, 2^217120451500 is an apocalyptic number.

217120451500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217120451500 is an abundant number, since it is smaller than the sum of its proper divisors (258595685396).

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

217120451500 is a wasteful number, since it uses less digits than its factorization.

217120451500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396603 (or 1396591 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The spelling of 217120451500 in words is "two hundred seventeen billion, one hundred twenty million, four hundred fifty-one thousand, five hundred".