220890457 has 2 divisors, whose sum is σ = 220890458. Its totient is φ = 220890456.

The previous prime is 220890451. The next prime is 220890499. The reversal of 220890457 is 754098022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220344336 + 546121 = 14844^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 220890457 - 2¹⁹ = 220366169 is a prime.

It is a super-3 number, since 3×220890457³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (220890451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110445228 + 110445229.

It is an arithmetic number, because the mean of its divisors is an integer number (110445229).

Almost surely, 2^220890457 is an apocalyptic number.

It is an amenable number.

220890457 is a deficient number, since it is larger than the sum of its proper divisors (1).

220890457 is an equidigital number, since it uses as much as digits as its factorization.

220890457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 220890457 is about 14862.3839608590. The cubic root of 220890457 is about 604.4944500605.

It can be divided in two parts, 2208 and 90457, that added together give a triangular number (92665 = T₄₃₀).

The spelling of 220890457 in words is "two hundred twenty million, eight hundred ninety thousand, four hundred fifty-seven".