51313499 has 4 divisors (see below), whose sum is σ = 53082960. Its totient is φ = 49544040.

The previous prime is 51313481. The next prime is 51313501. The reversal of 51313499 is 99431315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99431315 = 5 ⋅19886263.

It is a cyclic number.

It is not a de Polignac number, because 51313499 - 2¹² = 51309403 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (51313439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884687 + ... + 884744.

It is an arithmetic number, because the mean of its divisors is an integer number (13270740).

Almost surely, 2^51313499 is an apocalyptic number.

51313499 is a deficient number, since it is larger than the sum of its proper divisors (1769461).

51313499 is a wasteful number, since it uses less digits than its factorization.

51313499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769460.

The product of its digits is 14580, while the sum is 35.

The square root of 51313499 is about 7163.3441212886. The cubic root of 51313499 is about 371.6012873620.

The spelling of 51313499 in words is "fifty-one million, three hundred thirteen thousand, four hundred ninety-nine".