51031111234 has 12 divisors (see below), whose sum is σ = 77822113122. Its totient is φ = 25097264160.

The previous prime is 51031111223. The next prime is 51031111237. The reversal of 51031111234 is 43211113015.

It is a happy number.

51031111234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 19473365209 + 31557746025 = 139547^2 + 177645^2 .

It is not an unprimeable number, because it can be changed into a prime (51031111237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3421147 + ... + 3436030.

Almost surely, 2^51031111234 is an apocalyptic number.

51031111234 is a deficient number, since it is larger than the sum of its proper divisors (26791001888).

51031111234 is an equidigital number, since it uses as much as digits as its factorization.

51031111234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6857301 (or 6857240 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 51031111234 its reverse (43211113015), we get a palindrome (94242224249).

The spelling of 51031111234 in words is "fifty-one billion, thirty-one million, one hundred eleven thousand, two hundred thirty-four".