31816133130 has 32 divisors (see below), whose sum is σ = 78422471424. Its totient is φ = 8254996416.

The previous prime is 31816133123. The next prime is 31816133201. The reversal of 31816133130 is 3133161813.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14330482 + ... + 14332701.

It is an arithmetic number, because the mean of its divisors is an integer number (2450702232).

Almost surely, 2^31816133130 is an apocalyptic number.

31816133130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31816133130 is an abundant number, since it is smaller than the sum of its proper divisors (46606338294).

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

31816133130 is a wasteful number, since it uses less digits than its factorization.

31816133130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28663230.

The product of its (nonzero) digits is 3888, while the sum is 30.

Adding to 31816133130 its reverse (3133161813), we get a palindrome (34949294943).

The spelling of 31816133130 in words is "thirty-one billion, eight hundred sixteen million, one hundred thirty-three thousand, one hundred thirty".