51628723 has 2 divisors, whose sum is σ = 51628724. Its totient is φ = 51628722.

The previous prime is 51628693. The next prime is 51628763. The reversal of 51628723 is 32782615.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51628723 - 2⁵ = 51628691 is a prime.

It is a super-2 number, since 2×51628723² = 5331050077221458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51628763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25814361 + 25814362.

It is an arithmetic number, because the mean of its divisors is an integer number (25814362).

Almost surely, 2^51628723 is an apocalyptic number.

51628723 is a deficient number, since it is larger than the sum of its proper divisors (1).

51628723 is an equidigital number, since it uses as much as digits as its factorization.

51628723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 51628723 is about 7185.3130064041. The cubic root of 51628723 is about 372.3606625684.

The spelling of 51628723 in words is "fifty-one million, six hundred twenty-eight thousand, seven hundred twenty-three".