51047799 has 8 divisors (see below), whose sum is σ = 74251392. Its totient is φ = 30938040.

The previous prime is 51047779. The next prime is 51047807. The reversal of 51047799 is 99774015.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51047799 - 2⁷ = 51047671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51047799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51047779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773419 + ... + 773484.

It is an arithmetic number, because the mean of its divisors is an integer number (9281424).

Almost surely, 2^51047799 is an apocalyptic number.

51047799 is a deficient number, since it is larger than the sum of its proper divisors (23203593).

51047799 is a wasteful number, since it uses less digits than its factorization.

51047799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546917.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 51047799 is about 7144.7742441592. The cubic root of 51047799 is about 370.9587964596.

The spelling of 51047799 in words is "fifty-one million, forty-seven thousand, seven hundred ninety-nine".