221432145603642 has 48 divisors (see below), whose sum is σ = 518799720396672. Its totient is φ = 67990846538880.

The previous prime is 221432145603631. The next prime is 221432145603667. The reversal of 221432145603642 is 246306541234122.

221432145603642 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 3 + 2 + 14 + 560 + 36 + 42 = 666.

It is a super-2 number, since 2×221432145603642² (a number of 29 digits) contains 22 as substring.

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, 7698224584 + ... + 7698253347.

It is an arithmetic number, because the mean of its divisors is an integer number (10808327508264).

Almost surely, 2^{221432145603642} is an apocalyptic number.

221432145603642 is an abundant number, since it is smaller than the sum of its proper divisors (297367574793030).

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

221432145603642 is a wasteful number, since it uses less digits than its factorization.

221432145603642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15396478003 (or 15396478000 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 45.

Adding to 221432145603642 its reverse (246306541234122), we get a palindrome (467738686837764).

The spelling of 221432145603642 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, one hundred forty-five million, six hundred three thousand, six hundred forty-two".