51506049 has 16 divisors (see below), whose sum is σ = 79659008. Its totient is φ = 28991952.

The previous prime is 51506047. The next prime is 51506051. The reversal of 51506049 is 94060515.

It is an interprime number because it is at equal distance from previous prime (51506047) and next prime (51506051).

It is not a de Polignac number, because 51506049 - 2¹ = 51506047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51506041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16897 + ... + 19710.

It is an arithmetic number, because the mean of its divisors is an integer number (4978688).

Almost surely, 2^51506049 is an apocalyptic number.

It is an amenable number.

51506049 is a deficient number, since it is larger than the sum of its proper divisors (28152959).

51506049 is a wasteful number, since it uses less digits than its factorization.

51506049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36684.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51506049 is about 7176.7714886291. The cubic root of 51506049 is about 372.0655090436.

The spelling of 51506049 in words is "fifty-one million, five hundred six thousand, forty-nine".