221344531040 has 48 divisors (see below), whose sum is σ = 550448907120. Its totient is φ = 83877926400.

The previous prime is 221344531013. The next prime is 221344531043. The reversal of 221344531040 is 40135443122.

It is a junction number, because it is equal to n+sod(n) for n = 221344530994 and 221344531012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221344531043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36402311 + ... + 36408390.

It is an arithmetic number, because the mean of its divisors is an integer number (11467685565).

Almost surely, 2^221344531040 is an apocalyptic number.

221344531040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221344531040 is an abundant number, since it is smaller than the sum of its proper divisors (329104376080).

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

221344531040 is a wasteful number, since it uses less digits than its factorization.

221344531040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72810735 (or 72810727 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 221344531040 its reverse (40135443122), we get a palindrome (261479974162).

The spelling of 221344531040 in words is "two hundred twenty-one billion, three hundred forty-four million, five hundred thirty-one thousand, forty".