51599993 has 2 divisors, whose sum is σ = 51599994. Its totient is φ = 51599992.

The previous prime is 51599963. The next prime is 51600007. The reversal of 51599993 is 39999515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51437584 + 162409 = 7172^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 51599993 - 2⁶ = 51599929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51599963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25799996 + 25799997.

It is an arithmetic number, because the mean of its divisors is an integer number (25799997).

Almost surely, 2^51599993 is an apocalyptic number.

It is an amenable number.

51599993 is a deficient number, since it is larger than the sum of its proper divisors (1).

51599993 is an equidigital number, since it uses as much as digits as its factorization.

51599993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 492075, while the sum is 50.

The square root of 51599993 is about 7183.3135111869. The cubic root of 51599993 is about 372.2915801779.

The spelling of 51599993 in words is "fifty-one million, five hundred ninety-nine thousand, nine hundred ninety-three".