221332431434 has 4 divisors (see below), whose sum is σ = 331998647154. Its totient is φ = 110666215716.

The previous prime is 221332431427. The next prime is 221332431451. The reversal of 221332431434 is 434134233122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 219534417025 + 1798014409 = 468545^2 + 42403^2 .

It is a super-2 number, since 2×221332431434² (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 221332431434.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55333107857 + ... + 55333107860.

Almost surely, 2^221332431434 is an apocalyptic number.

221332431434 is a deficient number, since it is larger than the sum of its proper divisors (110666215720).

221332431434 is a wasteful number, since it uses less digits than its factorization.

221332431434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110666215719.

The product of its digits is 41472, while the sum is 32.

Adding to 221332431434 its reverse (434134233122), we get a palindrome (655466664556).

The spelling of 221332431434 in words is "two hundred twenty-one billion, three hundred thirty-two million, four hundred thirty-one thousand, four hundred thirty-four".