51049817 has 12 divisors (see below), whose sum is σ = 63953316. Its totient is φ = 40390560.

The previous prime is 51049813. The next prime is 51049841. The reversal of 51049817 is 71894015.

It can be written as a sum of positive squares in 2 ways, for example, as 12845056 + 38204761 = 3584^2 + 6181^2 .

It is not a de Polignac number, because 51049817 - 2² = 51049813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51049813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39434 + ... + 40707.

It is an arithmetic number, because the mean of its divisors is an integer number (5329443).

Almost surely, 2^51049817 is an apocalyptic number.

It is an amenable number.

51049817 is a deficient number, since it is larger than the sum of its proper divisors (12903499).

51049817 is a wasteful number, since it uses less digits than its factorization.

51049817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80168 (or 80161 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 51049817 is about 7144.9154648603. The cubic root of 51049817 is about 370.9636845906.

The spelling of 51049817 in words is "fifty-one million, forty-nine thousand, eight hundred seventeen".