247720219999 has 24 divisors (see below), whose sum is σ = 300897694688. Its totient is φ = 199737999360.

The previous prime is 247720219961. The next prime is 247720220017. The reversal of 247720219999 is 999912027742.

It is not a de Polignac number, because 247720219999 - 2¹¹ = 247720217951 is a prime.

It is a super-2 number, since 2×247720219999² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247723219999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4001119 + ... + 4062559.

Almost surely, 2^247720219999 is an apocalyptic number.

247720219999 is a deficient number, since it is larger than the sum of its proper divisors (53177474689).

247720219999 is a wasteful number, since it uses less digits than its factorization.

247720219999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63475 (or 63458 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 61.

The spelling of 247720219999 in words is "two hundred forty-seven billion, seven hundred twenty million, two hundred nineteen thousand, nine hundred ninety-nine".