220531469 has 2 divisors, whose sum is σ = 220531470. Its totient is φ = 220531468.

The previous prime is 220531411. The next prime is 220531483. The reversal of 220531469 is 964135022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208455844 + 12075625 = 14438^2 + 3475^2 .

It is a cyclic number.

It is not a de Polignac number, because 220531469 - 2¹⁶ = 220465933 is a prime.

It is a super-2 number, since 2×220531469² = 97268257638595922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220531369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110265734 + 110265735.

It is an arithmetic number, because the mean of its divisors is an integer number (110265735).

Almost surely, 2^220531469 is an apocalyptic number.

It is an amenable number.

220531469 is a deficient number, since it is larger than the sum of its proper divisors (1).

220531469 is an equidigital number, since it uses as much as digits as its factorization.

220531469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 220531469 is about 14850.3019834615. The cubic root of 220531469 is about 604.1668005982.

Adding to 220531469 its sum of digits (32), we get a triangular number (220531501 = T₂₁₀₀₁).

The spelling of 220531469 in words is "two hundred twenty million, five hundred thirty-one thousand, four hundred sixty-nine".