221424313400 has 24 divisors (see below), whose sum is σ = 514811529120. Its totient is φ = 88569725280.

The previous prime is 221424313399. The next prime is 221424313423. The reversal of 221424313400 is 4313424122.

It is a super-2 number, since 2×221424313400² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221424313400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 553560584 + ... + 553560983.

It is an arithmetic number, because the mean of its divisors is an integer number (21450480380).

Almost surely, 2^221424313400 is an apocalyptic number.

221424313400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221424313400 is an abundant number, since it is smaller than the sum of its proper divisors (293387215720).

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

221424313400 is a wasteful number, since it uses less digits than its factorization.

221424313400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107121583 (or 1107121574 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 221424313400 its reverse (4313424122), we get a palindrome (225737737522).

The spelling of 221424313400 in words is "two hundred twenty-one billion, four hundred twenty-four million, three hundred thirteen thousand, four hundred".