51047199 has 32 divisors (see below), whose sum is σ = 87011840. Its totient is φ = 28973376.

The previous prime is 51047197. The next prime is 51047203. The reversal of 51047199 is 99174015.

It is not a de Polignac number, because 51047199 - 2¹ = 51047197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51047197) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29979 + ... + 31635.

It is an arithmetic number, because the mean of its divisors is an integer number (2719120).

Almost surely, 2^51047199 is an apocalyptic number.

51047199 is a deficient number, since it is larger than the sum of its proper divisors (35964641).

51047199 is a wasteful number, since it uses less digits than its factorization.

51047199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836 (or 1830 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 51047199 is about 7144.7322553053. The cubic root of 51047199 is about 370.9573430757.

The spelling of 51047199 in words is "fifty-one million, forty-seven thousand, one hundred ninety-nine".