216347448800831 has 4 divisors (see below), whose sum is σ = 216494523886464. Its totient is φ = 216200373715200.

The previous prime is 216347448800797. The next prime is 216347448800869. The reversal of 216347448800831 is 138008844743612.

216347448800831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216347448800831 is a prime.

It is a super-2 number, since 2×216347448800831² (a number of 29 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 (216347448809831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73537540610 + ... + 73537543551.

It is an arithmetic number, because the mean of its divisors is an integer number (54123630971616).

Almost surely, 2^{216347448800831} is an apocalyptic number.

216347448800831 is a deficient number, since it is larger than the sum of its proper divisors (147075085633).

216347448800831 is a wasteful number, since it uses less digits than its factorization.

216347448800831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147075085632.

The product of its (nonzero) digits is 24772608, while the sum is 59.

The spelling of 216347448800831 in words is "two hundred sixteen trillion, three hundred forty-seven billion, four hundred forty-eight million, eight hundred thousand, eight hundred thirty-one".