51893239 has 2 divisors, whose sum is σ = 51893240. Its totient is φ = 51893238.

The previous prime is 51893189. The next prime is 51893251. The reversal of 51893239 is 93239815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51893239 - 2⁷ = 51893111 is a prime.

It is a super-2 number, since 2×51893239² = 5385816507822242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51893269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25946619 + 25946620.

It is an arithmetic number, because the mean of its divisors is an integer number (25946620).

Almost surely, 2^51893239 is an apocalyptic number.

51893239 is a deficient number, since it is larger than the sum of its proper divisors (1).

51893239 is an equidigital number, since it uses as much as digits as its factorization.

51893239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 51893239 is about 7203.6962040330. The cubic root of 51893239 is about 372.9955005243.

The spelling of 51893239 in words is "fifty-one million, eight hundred ninety-three thousand, two hundred thirty-nine".