51508849 has 12 divisors (see below), whose sum is σ = 60363684. Its totient is φ = 43822464.

The previous prime is 51508823. The next prime is 51508871. The reversal of 51508849 is 94880515.

It can be written as a sum of positive squares in 2 ways, for example, as 31438449 + 20070400 = 5607^2 + 4480^2 .

It is not a de Polignac number, because 51508849 - 2²³ = 43120241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51508819) 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, 2877 + ... + 10549.

It is an arithmetic number, because the mean of its divisors is an integer number (5030307).

Almost surely, 2^51508849 is an apocalyptic number.

It is an amenable number.

51508849 is a deficient number, since it is larger than the sum of its proper divisors (8854835).

51508849 is a wasteful number, since it uses less digits than its factorization.

51508849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7824 (or 7817 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 51508849 is about 7176.9665597660. The cubic root of 51508849 is about 372.0722510643.

The spelling of 51508849 in words is "fifty-one million, five hundred eight thousand, eight hundred forty-nine".