200221220654 has 64 divisors (see below), whose sum is σ = 401960797056. Its totient is φ = 72534196224.

The previous prime is 200221220653. The next prime is 200221220669. The reversal of 200221220654 is 456022122002.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200221220653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 760019 + ... + 988974.

It is an arithmetic number, because the mean of its divisors is an integer number (6280637454).

Almost surely, 2^200221220654 is an apocalyptic number.

200221220654 is an abundant number, since it is smaller than the sum of its proper divisors (201739576402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

200221220654 is a wasteful number, since it uses less digits than its factorization.

200221220654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749069.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 200221220654 its reverse (456022122002), we get a palindrome (656243342656).

The spelling of 200221220654 in words is "two hundred billion, two hundred twenty-one million, two hundred twenty thousand, six hundred fifty-four".