31818808051 has 8 divisors (see below), whose sum is σ = 33205607424. Its totient is φ = 30432289800.

The previous prime is 31818808031. The next prime is 31818808067. The reversal of 31818808051 is 15080881813.

It is a happy number.

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 31818808051 - 2²⁹ = 31281937139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31818807989 and 31818808007.

It is not an unprimeable number, because it can be changed into a prime (31818808031) 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, 180030 + ... + 309916.

It is an arithmetic number, because the mean of its divisors is an integer number (4150700928).

Almost surely, 2^31818808051 is an apocalyptic number.

31818808051 is a deficient number, since it is larger than the sum of its proper divisors (1386799373).

31818808051 is a wasteful number, since it uses less digits than its factorization.

31818808051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140561.

The product of its (nonzero) digits is 61440, while the sum is 43.

The spelling of 31818808051 in words is "thirty-one billion, eight hundred eighteen million, eight hundred eight thousand, fifty-one".