31818428152 has 32 divisors (see below), whose sum is σ = 68274201600. Its totient is φ = 13618098144.

The previous prime is 31818428113. The next prime is 31818428189. The reversal of 31818428152 is 25182481813.

It is a super-2 number, since 2×31818428152² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31818428099 and 31818428108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340752 + ... + 423967.

It is an arithmetic number, because the mean of its divisors is an integer number (2133568800).

Almost surely, 2^31818428152 is an apocalyptic number.

It is an amenable number.

31818428152 is an abundant number, since it is smaller than the sum of its proper divisors (36455773448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31818428152 is a wasteful number, since it uses less digits than its factorization.

31818428152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765475 (or 765471 counting only the distinct ones).

The product of its digits is 122880, while the sum is 43.

The spelling of 31818428152 in words is "thirty-one billion, eight hundred eighteen million, four hundred twenty-eight thousand, one hundred fifty-two".