51042501 has 16 divisors (see below), whose sum is σ = 76176000. Its totient is φ = 33777504.

The previous prime is 51042491. The next prime is 51042521. The reversal of 51042501 is 10524015.

It is not a de Polignac number, because 51042501 - 2⁵ = 51042469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51042521) 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, 3201 + ... + 10598.

It is an arithmetic number, because the mean of its divisors is an integer number (4761000).

Almost surely, 2^51042501 is an apocalyptic number.

It is an amenable number.

51042501 is a deficient number, since it is larger than the sum of its proper divisors (25133499).

51042501 is a wasteful number, since it uses less digits than its factorization.

51042501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13945 (or 13939 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51042501 is about 7144.4034740488. The cubic root of 51042501 is about 370.9459626859.

Adding to 51042501 its reverse (10524015), we get a palindrome (61566516).

The spelling of 51042501 in words is "fifty-one million, forty-two thousand, five hundred one".