221461423 has 2 divisors, whose sum is σ = 221461424. Its totient is φ = 221461422.

The previous prime is 221461403. The next prime is 221461447. The reversal of 221461423 is 324164122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221461423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221461403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110730711 + 110730712.

It is an arithmetic number, because the mean of its divisors is an integer number (110730712).

Almost surely, 2^221461423 is an apocalyptic number.

221461423 is a deficient number, since it is larger than the sum of its proper divisors (1).

221461423 is an equidigital number, since it uses as much as digits as its factorization.

221461423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

The square root of 221461423 is about 14881.5799900414. The cubic root of 221461423 is about 605.0148419736.

The spelling of 221461423 in words is "two hundred twenty-one million, four hundred sixty-one thousand, four hundred twenty-three".