220245491 has 2 divisors, whose sum is σ = 220245492. Its totient is φ = 220245490.

The previous prime is 220245461. The next prime is 220245503. The reversal of 220245491 is 194542022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220245491 - 2⁶ = 220245427 is a prime.

It is not a weakly prime, because it can be changed into another prime (220245461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110122745 + 110122746.

It is an arithmetic number, because the mean of its divisors is an integer number (110122746).

Almost surely, 2^220245491 is an apocalyptic number.

220245491 is a deficient number, since it is larger than the sum of its proper divisors (1).

220245491 is an equidigital number, since it uses as much as digits as its factorization.

220245491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 220245491 is about 14840.6701668085. The cubic root of 220245491 is about 603.9055330455.

The spelling of 220245491 in words is "two hundred twenty million, two hundred forty-five thousand, four hundred ninety-one".