220982054581 has 2 divisors, whose sum is σ = 220982054582. Its totient is φ = 220982054580.

The previous prime is 220982054561. The next prime is 220982054639. The reversal of 220982054581 is 185450289022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117806832900 + 103175221681 = 343230^2 + 321209^2 .

It is a cyclic number.

It is not a de Polignac number, because 220982054581 - 2²³ = 220973665973 is a prime.

It is a super-2 number, since 2×220982054581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220982054561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110491027290 + 110491027291.

It is an arithmetic number, because the mean of its divisors is an integer number (110491027291).

Almost surely, 2^220982054581 is an apocalyptic number.

It is an amenable number.

220982054581 is a deficient number, since it is larger than the sum of its proper divisors (1).

220982054581 is an equidigital number, since it uses as much as digits as its factorization.

220982054581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 220982054581 in words is "two hundred twenty billion, nine hundred eighty-two million, fifty-four thousand, five hundred eighty-one".