220995481 has 8 divisors (see below), whose sum is σ = 253528704. Its totient is φ = 188702880.

The previous prime is 220995473. The next prime is 220995491. The reversal of 220995481 is 184599022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220995481 - 2³ = 220995473 is a prime.

It is a super-2 number, since 2×220995481² = 97678005244842722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220995421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58180 + ... + 61861.

It is an arithmetic number, because the mean of its divisors is an integer number (31691088).

Almost surely, 2^220995481 is an apocalyptic number.

It is an amenable number.

220995481 is a deficient number, since it is larger than the sum of its proper divisors (32533223).

220995481 is a wasteful number, since it uses less digits than its factorization.

220995481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120311.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 220995481 is about 14865.9167561237. The cubic root of 220995481 is about 604.5902386653.

It can be divided in two parts, 2209 and 95481, that multiplied together give a square (210917529 = 14523²).

The spelling of 220995481 in words is "two hundred twenty million, nine hundred ninety-five thousand, four hundred eighty-one".