220738973 has 12 divisors (see below), whose sum is σ = 276530940. Its totient is φ = 174650112.

The previous prime is 220738963. The next prime is 220738993. The reversal of 220738973 is 379837022.

220738973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 72216004 + 148522969 = 8498^2 + 12187^2 .

It is a de Polignac number, because none of the positive numbers 2^k-220738973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220738973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220738963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172628 + ... + 173901.

It is an arithmetic number, because the mean of its divisors is an integer number (23044245).

Almost surely, 2^220738973 is an apocalyptic number.

It is an amenable number.

220738973 is a deficient number, since it is larger than the sum of its proper divisors (55791967).

220738973 is a wasteful number, since it uses less digits than its factorization.

220738973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346556 (or 346549 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 220738973 is about 14857.2868653735. The cubic root of 220738973 is about 604.3562334692.

The spelling of 220738973 in words is "two hundred twenty million, seven hundred thirty-eight thousand, nine hundred seventy-three".