220963691 has 24 divisors (see below), whose sum is σ = 256908960. Its totient is φ = 188559360.

The previous prime is 220963669. The next prime is 220963697. The reversal of 220963691 is 196369022.

It is not a de Polignac number, because 220963691 - 2¹⁰ = 220962667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220963697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 286955 + ... + 287723.

It is an arithmetic number, because the mean of its divisors is an integer number (10704540).

Almost surely, 2^220963691 is an apocalyptic number.

220963691 is a deficient number, since it is larger than the sum of its proper divisors (35945269).

220963691 is a wasteful number, since it uses less digits than its factorization.

220963691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 220963691 is about 14864.8474933314. The cubic root of 220963691 is about 604.5612473555.

The spelling of 220963691 in words is "two hundred twenty million, nine hundred sixty-three thousand, six hundred ninety-one".