220897471 has 2 divisors, whose sum is σ = 220897472. Its totient is φ = 220897470.

The previous prime is 220897433. The next prime is 220897483. The reversal of 220897471 is 174798022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220897471 is a prime.

It is a super-3 number, since 3×220897471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220897871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110448735 + 110448736.

It is an arithmetic number, because the mean of its divisors is an integer number (110448736).

Almost surely, 2^220897471 is an apocalyptic number.

220897471 is a deficient number, since it is larger than the sum of its proper divisors (1).

220897471 is an equidigital number, since it uses as much as digits as its factorization.

220897471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 220897471 is about 14862.6199238223. The cubic root of 220897471 is about 604.5008482231.

The spelling of 220897471 in words is "two hundred twenty million, eight hundred ninety-seven thousand, four hundred seventy-one".