216254723 has 2 divisors, whose sum is σ = 216254724. Its totient is φ = 216254722.

The previous prime is 216254683. The next prime is 216254737. The reversal of 216254723 is 327452612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216254723 - 2⁶ = 216254659 is a prime.

It is a super-2 number, since 2×216254723² = 93532210439613458, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216254723.

It is not a weakly prime, because it can be changed into another prime (216254023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108127361 + 108127362.

It is an arithmetic number, because the mean of its divisors is an integer number (108127362).

Almost surely, 2^216254723 is an apocalyptic number.

216254723 is a deficient number, since it is larger than the sum of its proper divisors (1).

216254723 is an equidigital number, since it uses as much as digits as its factorization.

216254723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 216254723 is about 14705.6017557936. The cubic root of 216254723 is about 600.2357619780.

The spelling of 216254723 in words is "two hundred sixteen million, two hundred fifty-four thousand, seven hundred twenty-three".