51350031 has 14 divisors (see below), whose sum is σ = 76990920. Its totient is φ = 34232868.

The previous prime is 51350029. The next prime is 51350051. The reversal of 51350031 is 13005315.

It is a happy number.

51350031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51350031 - 2¹ = 51350029 is a prime.

It is a super-2 number, since 2×51350031² = 5273651367401922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51349986 and 51350013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51350021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 34491 + ... + 35948.

Almost surely, 2^51350031 is an apocalyptic number.

51350031 is a deficient number, since it is larger than the sum of its proper divisors (25640889).

51350031 is an frugal number, since it uses more digits than its factorization.

51350031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70457 (or 70442 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 51350031 is about 7165.8935939630. The cubic root of 51350031 is about 371.6894520631.

Adding to 51350031 its reverse (13005315), we get a palindrome (64355346).

The spelling of 51350031 in words is "fifty-one million, three hundred fifty thousand, thirty-one".