51730999 has 2 divisors, whose sum is σ = 51731000. Its totient is φ = 51730998.

The previous prime is 51730993. The next prime is 51731011. The reversal of 51730999 is 99903715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51730999 - 2⁹ = 51730487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51730993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25865499 + 25865500.

It is an arithmetic number, because the mean of its divisors is an integer number (25865500).

Almost surely, 2^51730999 is an apocalyptic number.

51730999 is a deficient number, since it is larger than the sum of its proper divisors (1).

51730999 is an equidigital number, since it uses as much as digits as its factorization.

51730999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 51730999 is about 7192.4265029265. The cubic root of 51730999 is about 372.6063813391.

The spelling of 51730999 in words is "fifty-one million, seven hundred thirty thousand, nine hundred ninety-nine".