51223723 has 2 divisors, whose sum is σ = 51223724. Its totient is φ = 51223722.

The previous prime is 51223709. The next prime is 51223729. The reversal of 51223723 is 32732215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51223723 - 2¹⁷ = 51092651 is a prime.

It is not a weakly prime, because it can be changed into another prime (51223729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25611861 + 25611862.

It is an arithmetic number, because the mean of its divisors is an integer number (25611862).

Almost surely, 2^51223723 is an apocalyptic number.

51223723 is a deficient number, since it is larger than the sum of its proper divisors (1).

51223723 is an equidigital number, since it uses as much as digits as its factorization.

51223723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 25.

The square root of 51223723 is about 7157.0750310445. The cubic root of 51223723 is about 371.3844480483.

Adding to 51223723 its reverse (32732215), we get a palindrome (83955938).

The spelling of 51223723 in words is "fifty-one million, two hundred twenty-three thousand, seven hundred twenty-three".