220507649 has 4 divisors (see below), whose sum is σ = 220601520. Its totient is φ = 220413780.

The previous prime is 220507627. The next prime is 220507667. The reversal of 220507649 is 946705022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220507649 - 2⁸ = 220507393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220507699) 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 in 3 ways as a sum of consecutive naturals, for example, 43319 + ... + 48140.

It is an arithmetic number, because the mean of its divisors is an integer number (55150380).

Almost surely, 2^220507649 is an apocalyptic number.

It is an amenable number.

220507649 is a deficient number, since it is larger than the sum of its proper divisors (93871).

220507649 is an equidigital number, since it uses as much as digits as its factorization.

220507649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93870.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 220507649 is about 14849.4999579110. The cubic root of 220507649 is about 604.1450474346.

The spelling of 220507649 in words is "two hundred twenty million, five hundred seven thousand, six hundred forty-nine".