51431011231 has 8 divisors (see below), whose sum is σ = 51742327824. Its totient is φ = 51120202560.

The previous prime is 51431011223. The next prime is 51431011253. The reversal of 51431011231 is 13211013415.

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 51431011231 - 2³ = 51431011223 is a prime.

It is a super-2 number, since 2×51431011231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51431011201) 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, 77136 + ... + 329866.

It is an arithmetic number, because the mean of its divisors is an integer number (6467790978).

Almost surely, 2^51431011231 is an apocalyptic number.

51431011231 is a deficient number, since it is larger than the sum of its proper divisors (311316593).

51431011231 is a wasteful number, since it uses less digits than its factorization.

51431011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253961.

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

Adding to 51431011231 its reverse (13211013415), we get a palindrome (64642024646).

The spelling of 51431011231 in words is "fifty-one billion, four hundred thirty-one million, eleven thousand, two hundred thirty-one".