220621079 has 24 divisors (see below), whose sum is σ = 269375616. Its totient is φ = 179928000.

The previous prime is 220621057. The next prime is 220621091. The reversal of 220621079 is 970126022.

220621079 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-220621079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220621039) 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, 91469 + ... + 93849.

It is an arithmetic number, because the mean of its divisors is an integer number (11223984).

Almost surely, 2^220621079 is an apocalyptic number.

220621079 is a deficient number, since it is larger than the sum of its proper divisors (48754537).

220621079 is a wasteful number, since it uses less digits than its factorization.

220621079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 220621079 is about 14853.3187873956. The cubic root of 220621079 is about 604.2486212048.

The spelling of 220621079 in words is "two hundred twenty million, six hundred twenty-one thousand, seventy-nine".