220663631 has 4 divisors (see below), whose sum is σ = 220734600. Its totient is φ = 220592664.

The previous prime is 220663627. The next prime is 220663661. The reversal of 220663631 is 136366022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220663631 - 2² = 220663627 is a prime.

It is a super-2 number, since 2×220663631² = 97384876092208322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220663594 and 220663603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220663661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30596 + ... + 37113.

It is an arithmetic number, because the mean of its divisors is an integer number (55183650).

Almost surely, 2^220663631 is an apocalyptic number.

220663631 is a deficient number, since it is larger than the sum of its proper divisors (70969).

220663631 is an equidigital number, since it uses as much as digits as its factorization.

220663631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70968.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 220663631 is about 14854.7511254817. The cubic root of 220663631 is about 604.2874665931.

The spelling of 220663631 in words is "two hundred twenty million, six hundred sixty-three thousand, six hundred thirty-one".