51248313 has 12 divisors (see below), whose sum is σ = 74378928. Its totient is φ = 34002360.

The previous prime is 51248311. The next prime is 51248317. The reversal of 51248313 is 31384215.

It is a happy number.

It is not a de Polignac number, because 51248313 - 2¹ = 51248311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51248311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11595 + ... + 15392.

It is an arithmetic number, because the mean of its divisors is an integer number (6198244).

Almost surely, 2^51248313 is an apocalyptic number.

It is an amenable number.

51248313 is a deficient number, since it is larger than the sum of its proper divisors (23130615).

51248313 is a wasteful number, since it uses less digits than its factorization.

51248313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27204 (or 27201 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 51248313 is about 7158.7927054776. The cubic root of 51248313 is about 371.4438663679.

The spelling of 51248313 in words is "fifty-one million, two hundred forty-eight thousand, three hundred thirteen".