221022251450 has 96 divisors (see below), whose sum is σ = 551968421760. Its totient is φ = 63590803200.

The previous prime is 221022251413. The next prime is 221022251459. The reversal of 221022251450 is 54152220122.

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

It is not an unprimeable number, because it can be changed into a prime (221022251459) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2157965 + ... + 2258064.

It is an arithmetic number, because the mean of its divisors is an integer number (5749671060).

Almost surely, 2^221022251450 is an apocalyptic number.

221022251450 is an abundant number, since it is smaller than the sum of its proper divisors (330946170310).

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

221022251450 is a wasteful number, since it uses less digits than its factorization.

221022251450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416072 (or 4416067 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 221022251450 its reverse (54152220122), we get a palindrome (275174471572).

The spelling of 221022251450 in words is "two hundred twenty-one billion, twenty-two million, two hundred fifty-one thousand, four hundred fifty".