51768499 has 4 divisors (see below), whose sum is σ = 51975000. Its totient is φ = 51562000.

The previous prime is 51768491. The next prime is 51768523. The reversal of 51768499 is 99486715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99486715 = 5 ⋅19897343.

It is a cyclic number.

It is not a de Polignac number, because 51768499 - 2³ = 51768491 is a prime.

It is a super-3 number, since 3×51768499³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51768491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102874 + ... + 103375.

It is an arithmetic number, because the mean of its divisors is an integer number (12993750).

Almost surely, 2^51768499 is an apocalyptic number.

51768499 is a deficient number, since it is larger than the sum of its proper divisors (206501).

51768499 is a wasteful number, since it uses less digits than its factorization.

51768499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206500.

The product of its digits is 544320, while the sum is 49.

The square root of 51768499 is about 7195.0329394659. The cubic root of 51768499 is about 372.6963941917.

The spelling of 51768499 in words is "fifty-one million, seven hundred sixty-eight thousand, four hundred ninety-nine".