220536997 has 2 divisors, whose sum is σ = 220536998. Its totient is φ = 220536996.

The previous prime is 220536973. The next prime is 220537001. The reversal of 220536997 is 799635022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152127556 + 68409441 = 12334^2 + 8271^2 .

It is a cyclic number.

It is not a de Polignac number, because 220536997 - 2¹¹ = 220534949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220536907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110268498 + 110268499.

It is an arithmetic number, because the mean of its divisors is an integer number (110268499).

Almost surely, 2^220536997 is an apocalyptic number.

It is an amenable number.

220536997 is a deficient number, since it is larger than the sum of its proper divisors (1).

220536997 is an equidigital number, since it uses as much as digits as its factorization.

220536997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 220536997 is about 14850.4881064563. The cubic root of 220536997 is about 604.1718487155.

The spelling of 220536997 in words is "two hundred twenty million, five hundred thirty-six thousand, nine hundred ninety-seven".