216071253831 has 8 divisors (see below), whose sum is σ = 288281722240. Its totient is φ = 143954143992.

The previous prime is 216071253823. The next prime is 216071253841. The reversal of 216071253831 is 138352170612.

It is a happy number.

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

It is not a de Polignac number, because 216071253831 - 2³ = 216071253823 is a prime.

It is a super-2 number, since 2×216071253831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216071253831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216071253841) 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, 23334241 + ... + 23343498.

It is an arithmetic number, because the mean of its divisors is an integer number (36035215280).

Almost surely, 2^216071253831 is an apocalyptic number.

216071253831 is a deficient number, since it is larger than the sum of its proper divisors (72210468409).

216071253831 is a wasteful number, since it uses less digits than its factorization.

216071253831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46679285.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 216071253831 in words is "two hundred sixteen billion, seventy-one million, two hundred fifty-three thousand, eight hundred thirty-one".