200221220154 has 32 divisors (see below), whose sum is σ = 412665757056. Its totient is φ = 64722682880.

The previous prime is 200221220153. The next prime is 200221220179. The reversal of 200221220154 is 451022122002.

It is a self number, because there is not a number n which added to its sum of digits gives 200221220154.

It is not an unprimeable number, because it can be changed into a prime (200221220153) 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, 2395767 + ... + 2477930.

It is an arithmetic number, because the mean of its divisors is an integer number (12895804908).

Almost surely, 2^200221220154 is an apocalyptic number.

200221220154 is an abundant number, since it is smaller than the sum of its proper divisors (212444536902).

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

200221220154 is a wasteful number, since it uses less digits than its factorization.

200221220154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4873910.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 200221220154 its reverse (451022122002), we get a palindrome (651243342156).

The spelling of 200221220154 in words is "two hundred billion, two hundred twenty-one million, two hundred twenty thousand, one hundred fifty-four".