220995951 has 16 divisors (see below), whose sum is σ = 322232448. Its totient is φ = 133610400.

The previous prime is 220995947. The next prime is 220995967. The reversal of 220995951 is 159599022.

It is a happy number.

220995951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220995951 - 2² = 220995947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220995991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5940 + ... + 21846.

It is an arithmetic number, because the mean of its divisors is an integer number (20139528).

Almost surely, 2^220995951 is an apocalyptic number.

220995951 is a deficient number, since it is larger than the sum of its proper divisors (101236497).

220995951 is a wasteful number, since it uses less digits than its factorization.

220995951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16342.

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 220995951 is about 14865.9325640876. The cubic root of 220995951 is about 604.5906672671.

The spelling of 220995951 in words is "two hundred twenty million, nine hundred ninety-five thousand, nine hundred fifty-one".