220144931 has 8 divisors (see below), whose sum is σ = 227117184. Its totient is φ = 213226560.

The previous prime is 220144927. The next prime is 220144933. The reversal of 220144931 is 139441022.

220144931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220144931 - 2² = 220144927 is a prime.

It is a super-2 number, since 2×220144931² = 96927581289989522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220144931.

It is not an unprimeable number, because it can be changed into a prime (220144933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5090 + ... + 21591.

It is an arithmetic number, because the mean of its divisors is an integer number (28389648).

Almost surely, 2^220144931 is an apocalyptic number.

220144931 is a deficient number, since it is larger than the sum of its proper divisors (6972253).

220144931 is a wasteful number, since it uses less digits than its factorization.

220144931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26941.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 220144931 is about 14837.2817928352. The cubic root of 220144931 is about 603.8136083709.

Adding to 220144931 its reverse (139441022), we get a palindrome (359585953).

The spelling of 220144931 in words is "two hundred twenty million, one hundred forty-four thousand, nine hundred thirty-one".