216165430631 has 8 divisors (see below), whose sum is σ = 216920618880. Its totient is φ = 215411382648.

The previous prime is 216165430619. The next prime is 216165430687. The reversal of 216165430631 is 136034561612.

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

It is a cyclic number.

It is not a de Polignac number, because 216165430631 - 2¹⁰ = 216165429607 is a prime.

It is a super-2 number, since 2×216165430631² (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 (216165432631) 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, 95630 + ... + 664436.

It is an arithmetic number, because the mean of its divisors is an integer number (27115077360).

Almost surely, 2^216165430631 is an apocalyptic number.

216165430631 is a deficient number, since it is larger than the sum of its proper divisors (755188249).

216165430631 is an equidigital number, since it uses as much as digits as its factorization.

216165430631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570133.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 216165430631 in words is "two hundred sixteen billion, one hundred sixty-five million, four hundred thirty thousand, six hundred thirty-one".