51238519 has 2 divisors, whose sum is σ = 51238520. Its totient is φ = 51238518.

The previous prime is 51238513. The next prime is 51238529. The reversal of 51238519 is 91583215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51238519 - 2³ = 51238511 is a prime.

It is a super-2 number, since 2×51238519² = 5250771658626722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51238511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25619259 + 25619260.

It is an arithmetic number, because the mean of its divisors is an integer number (25619260).

Almost surely, 2^51238519 is an apocalyptic number.

51238519 is a deficient number, since it is larger than the sum of its proper divisors (1).

51238519 is an equidigital number, since it uses as much as digits as its factorization.

51238519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 34.

The square root of 51238519 is about 7158.1086189021. The cubic root of 51238519 is about 371.4202028052.

The spelling of 51238519 in words is "fifty-one million, two hundred thirty-eight thousand, five hundred nineteen".