221525642450632 has 16 divisors (see below), whose sum is σ = 447311393410140. Its totient is φ = 102242604207936.

The previous prime is 221525642450617. The next prime is 221525642450639. The reversal of 221525642450632 is 236054246525122.

It can be written as a sum of positive squares in 2 ways, for example, as 221350896713956 + 174745736676 = 14877866^2 + 418026^2 .

It is a super-2 number, since 2×221525642450632² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221525642450639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065027127063 + ... + 1065027127270.

Almost surely, 2^{221525642450632} is an apocalyptic number.

It is an amenable number.

221525642450632 is an abundant number, since it is smaller than the sum of its proper divisors (225785750959508).

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

221525642450632 is a wasteful number, since it uses less digits than its factorization.

221525642450632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130054254352 (or 2130054254348 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 49.

Adding to 221525642450632 its reverse (236054246525122), we get a palindrome (457579888975754).

The spelling of 221525642450632 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, six hundred forty-two million, four hundred fifty thousand, six hundred thirty-two".