51132313 has 4 divisors (see below), whose sum is σ = 51522768. Its totient is φ = 50741860.

The previous prime is 51132293. The next prime is 51132317. The reversal of 51132313 is 31323115.

51132313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51132313 is a prime.

It is a super-2 number, since 2×51132313² = 5229026865459938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51132317) 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 3 ways as a sum of consecutive naturals, for example, 195031 + ... + 195292.

It is an arithmetic number, because the mean of its divisors is an integer number (12880692).

Almost surely, 2^51132313 is an apocalyptic number.

It is an amenable number.

51132313 is a deficient number, since it is larger than the sum of its proper divisors (390455).

51132313 is a wasteful number, since it uses less digits than its factorization.

51132313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390454.

The product of its digits is 270, while the sum is 19.

The square root of 51132313 is about 7150.6861908491. The cubic root of 51132313 is about 371.1634015990.

Adding to 51132313 its reverse (31323115), we get a palindrome (82455428).

The spelling of 51132313 in words is "fifty-one million, one hundred thirty-two thousand, three hundred thirteen".