51299587 has 4 divisors (see below), whose sum is σ = 51314656. Its totient is φ = 51284520.

The previous prime is 51299581. The next prime is 51299603. The reversal of 51299587 is 78599215.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78599215 = 5 ⋅15719843.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51299587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51299581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262 + ... + 10132.

It is an arithmetic number, because the mean of its divisors is an integer number (12828664).

Almost surely, 2^51299587 is an apocalyptic number.

51299587 is a deficient number, since it is larger than the sum of its proper divisors (15069).

51299587 is an equidigital number, since it uses as much as digits as its factorization.

51299587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15068.

The product of its digits is 226800, while the sum is 46.

The square root of 51299587 is about 7162.3730006193. The cubic root of 51299587 is about 371.5677017592.

The spelling of 51299587 in words is "fifty-one million, two hundred ninety-nine thousand, five hundred eighty-seven".