220946481 has 16 divisors (see below), whose sum is σ = 374089600. Its totient is φ = 126255024.

The previous prime is 220946471. The next prime is 220946491. The reversal of 220946481 is 184649022.

220946481 is a `hidden beast` number, since 2 + 2 + 0 + 9 + 4 + 648 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (220946471) and next prime (220946491).

It is not a de Polignac number, because 220946481 - 2⁵ = 220946449 is a prime.

It is a super-2 number, since 2×220946481² = 97634694932566722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220946461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584326 + ... + 584703.

It is an arithmetic number, because the mean of its divisors is an integer number (23380600).

Almost surely, 2^220946481 is an apocalyptic number.

220946481 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220946481 is a deficient number, since it is larger than the sum of its proper divisors (153143119).

220946481 is a wasteful number, since it uses less digits than its factorization.

220946481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169045 (or 1169039 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 220946481 is about 14864.2685995645. The cubic root of 220946481 is about 604.5455513089.

The spelling of 220946481 in words is "two hundred twenty million, nine hundred forty-six thousand, four hundred eighty-one".