220149481 has 2 divisors, whose sum is σ = 220149482. Its totient is φ = 220149480.

The previous prime is 220149467. The next prime is 220149511. The reversal of 220149481 is 184941022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213306025 + 6843456 = 14605^2 + 2616^2 .

It is a cyclic number.

It is not a de Polignac number, because 220149481 - 2²³ = 211760873 is a prime.

It is a super-2 number, since 2×220149481² = 96931587969138722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220149431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110074740 + 110074741.

It is an arithmetic number, because the mean of its divisors is an integer number (110074741).

Almost surely, 2^220149481 is an apocalyptic number.

It is an amenable number.

220149481 is a deficient number, since it is larger than the sum of its proper divisors (1).

220149481 is an equidigital number, since it uses as much as digits as its factorization.

220149481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 220149481 is about 14837.4351220149. The cubic root of 220149481 is about 603.8177682562.

The spelling of 220149481 in words is "two hundred twenty million, one hundred forty-nine thousand, four hundred eighty-one".