51042519 has 24 divisors (see below), whose sum is σ = 81114384. Its totient is φ = 30927600.

The previous prime is 51042491. The next prime is 51042521. The reversal of 51042519 is 91524015.

It is not a de Polignac number, because 51042519 - 2⁵ = 51042487 is a prime.

It is a super-2 number, since 2×51042519² = 5210677491730722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51042492 and 51042501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51042599) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9849 + ... + 14109.

It is an arithmetic number, because the mean of its divisors is an integer number (3379766).

Almost surely, 2^51042519 is an apocalyptic number.

51042519 is a deficient number, since it is larger than the sum of its proper divisors (30071865).

51042519 is a wasteful number, since it uses less digits than its factorization.

51042519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300 (or 4275 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 51042519 is about 7144.4047337759. The cubic root of 51042519 is about 370.9460062903.

The spelling of 51042519 in words is "fifty-one million, forty-two thousand, five hundred nineteen".