51431054430 has 32 divisors (see below), whose sum is σ = 141068035584. Its totient is φ = 11755669536.

The previous prime is 51431054393. The next prime is 51431054447. The reversal of 51431054430 is 3445013415.

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

It is a Curzon number.

It is a congruent number.

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, 122454682 + ... + 122455101.

It is an arithmetic number, because the mean of its divisors is an integer number (4408376112).

Almost surely, 2^51431054430 is an apocalyptic number.

51431054430 is an abundant number, since it is smaller than the sum of its proper divisors (89636981154).

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

51431054430 is a wasteful number, since it uses less digits than its factorization.

51431054430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244909800.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 51431054430 its reverse (3445013415), we get a palindrome (54876067845).

The spelling of 51431054430 in words is "fifty-one billion, four hundred thirty-one million, fifty-four thousand, four hundred thirty".