221263723 has 2 divisors, whose sum is σ = 221263724. Its totient is φ = 221263722.

The previous prime is 221263717. The next prime is 221263727. The reversal of 221263723 is 327362122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221263723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221263691 and 221263700.

It is not a weakly prime, because it can be changed into another prime (221263727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110631861 + 110631862.

It is an arithmetic number, because the mean of its divisors is an integer number (110631862).

Almost surely, 2^221263723 is an apocalyptic number.

221263723 is a deficient number, since it is larger than the sum of its proper divisors (1).

221263723 is an equidigital number, since it uses as much as digits as its factorization.

221263723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 28.

The square root of 221263723 is about 14874.9360670895. The cubic root of 221263723 is about 604.8347548612.

The spelling of 221263723 in words is "two hundred twenty-one million, two hundred sixty-three thousand, seven hundred twenty-three".