51010321431 has 32 divisors (see below), whose sum is σ = 72953680320. Its totient is φ = 31590383616.

The previous prime is 51010321423. The next prime is 51010321463. The reversal of 51010321431 is 13412301015.

It is not a de Polignac number, because 51010321431 - 2³ = 51010321423 is a prime.

It is a super-2 number, since 2×51010321431² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51010321398 and 51010321407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51010321631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2609265 + ... + 2628741.

It is an arithmetic number, because the mean of its divisors is an integer number (2279802510).

Almost surely, 2^51010321431 is an apocalyptic number.

51010321431 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51010321431 is a deficient number, since it is larger than the sum of its proper divisors (21943358889).

51010321431 is a wasteful number, since it uses less digits than its factorization.

51010321431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20163.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 51010321431 its reverse (13412301015), we get a palindrome (64422622446).

The spelling of 51010321431 in words is "fifty-one billion, ten million, three hundred twenty-one thousand, four hundred thirty-one".