51500023 has 2 divisors, whose sum is σ = 51500024. Its totient is φ = 51500022.

The previous prime is 51500011. The next prime is 51500069. The reversal of 51500023 is 32000515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51500023 - 2¹³ = 51491831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51506023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25750011 + 25750012.

It is an arithmetic number, because the mean of its divisors is an integer number (25750012).

Almost surely, 2^51500023 is an apocalyptic number.

51500023 is a deficient number, since it is larger than the sum of its proper divisors (1).

51500023 is an equidigital number, since it uses as much as digits as its factorization.

51500023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 51500023 is about 7176.3516496894. The cubic root of 51500023 is about 372.0509984231.

Adding to 51500023 its reverse (32000515), we get a palindrome (83500538).

The spelling of 51500023 in words is "fifty-one million, five hundred thousand, twenty-three".