220131077 has 2 divisors, whose sum is σ = 220131078. Its totient is φ = 220131076.

The previous prime is 220131073. The next prime is 220131089. The reversal of 220131077 is 770131022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220047556 + 83521 = 14834^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 220131077 - 2² = 220131073 is a prime.

It is a super-2 number, since 2×220131077² = 96915382122359858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220131071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110065538 + 110065539.

It is an arithmetic number, because the mean of its divisors is an integer number (110065539).

Almost surely, 2^220131077 is an apocalyptic number.

It is an amenable number.

220131077 is a deficient number, since it is larger than the sum of its proper divisors (1).

220131077 is an equidigital number, since it uses as much as digits as its factorization.

220131077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 220131077 is about 14836.8149209997. The cubic root of 220131077 is about 603.8009418528.

Adding to 220131077 its reverse (770131022), we get a palindrome (990262099).

Subtracting 220131077 from its reverse (770131022), we obtain a palindrome (549999945).

The spelling of 220131077 in words is "two hundred twenty million, one hundred thirty-one thousand, seventy-seven".