216875145631 has 8 divisors (see below), whose sum is σ = 228294974720. Its totient is φ = 205455851352.

The previous prime is 216875145601. The next prime is 216875145667. The reversal of 216875145631 is 136541578612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216875145631 is a prime.

It is a super-2 number, since 2×216875145631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216875145601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 906106 + ... + 1120168.

It is an arithmetic number, because the mean of its divisors is an integer number (28536871840).

Almost surely, 2^216875145631 is an apocalyptic number.

216875145631 is a deficient number, since it is larger than the sum of its proper divisors (11419829089).

216875145631 is a wasteful number, since it uses less digits than its factorization.

216875145631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267405.

The product of its digits is 1209600, while the sum is 49.

The spelling of 216875145631 in words is "two hundred sixteen billion, eight hundred seventy-five million, one hundred forty-five thousand, six hundred thirty-one".