51315433 has 8 divisors (see below), whose sum is σ = 55584648. Its totient is φ = 47092224.

The previous prime is 51315431. The next prime is 51315437. The reversal of 51315433 is 33451315.

It can be written as a sum of positive squares in 4 ways, for example, as 26594649 + 24720784 = 5157^2 + 4972^2 .

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 51315433 - 2¹ = 51315431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51315398 and 51315407.

It is not an unprimeable number, because it can be changed into a prime (51315431) 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, 9160 + ... + 13657.

It is an arithmetic number, because the mean of its divisors is an integer number (6948081).

Almost surely, 2^51315433 is an apocalyptic number.

It is an amenable number.

51315433 is a deficient number, since it is larger than the sum of its proper divisors (4269215).

51315433 is a wasteful number, since it uses less digits than its factorization.

51315433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23003.

The product of its digits is 2700, while the sum is 25.

The square root of 51315433 is about 7163.4791128334. The cubic root of 51315433 is about 371.6059558402.

Adding to 51315433 its reverse (33451315), we get a palindrome (84766748).

The spelling of 51315433 in words is "fifty-one million, three hundred fifteen thousand, four hundred thirty-three".