51312735 has 24 divisors (see below), whose sum is σ = 89738064. Its totient is φ = 27121920.

The previous prime is 51312733. The next prime is 51312739. The reversal of 51312735 is 53721315.

It is not a de Polignac number, because 51312735 - 2¹ = 51312733 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51312699 and 51312708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40 + ... + 10130.

It is an arithmetic number, because the mean of its divisors is an integer number (3739086).

Almost surely, 2^51312735 is an apocalyptic number.

51312735 is a deficient number, since it is larger than the sum of its proper divisors (38425329).

51312735 is a wasteful number, since it uses less digits than its factorization.

51312735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215 (or 10212 counting only the distinct ones).

The product of its digits is 3150, while the sum is 27.

The square root of 51312735 is about 7163.2907940415. The cubic root of 51312735 is about 371.5994431118.

The spelling of 51312735 in words is "fifty-one million, three hundred twelve thousand, seven hundred thirty-five".