221432552425 has 24 divisors (see below), whose sum is σ = 313969208256. Its totient is φ = 151758344640.

The previous prime is 221432552389. The next prime is 221432552503. The reversal of 221432552425 is 524255234122.

It is not a de Polignac number, because 221432552425 - 2¹⁹ = 221432028137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8587 + ... + 665536.

It is an arithmetic number, because the mean of its divisors is an integer number (13082050344).

Almost surely, 2^221432552425 is an apocalyptic number.

221432552425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221432552425 is a deficient number, since it is larger than the sum of its proper divisors (92536655831).

221432552425 is a wasteful number, since it uses less digits than its factorization.

221432552425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676017 (or 676012 counting only the distinct ones).

The product of its digits is 192000, while the sum is 37.

Adding to 221432552425 its reverse (524255234122), we get a palindrome (745687786547).

The spelling of 221432552425 in words is "two hundred twenty-one billion, four hundred thirty-two million, five hundred fifty-two thousand, four hundred twenty-five".