221435301056 has 28 divisors (see below), whose sum is σ = 439444025352. Its totient is φ = 110709247488.

The previous prime is 221435301053. The next prime is 221435301071. The reversal of 221435301056 is 650103534122.

It is a happy number.

It is a super-2 number, since 2×221435301056² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (221435301053) 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, 766091 + ... + 1014773.

Almost surely, 2^221435301056 is an apocalyptic number.

It is an amenable number.

221435301056 is a deficient number, since it is larger than the sum of its proper divisors (218008724296).

221435301056 is a wasteful number, since it uses less digits than its factorization.

221435301056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262608 (or 262598 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 221435301056 its reverse (650103534122), we get a palindrome (871538835178).

The spelling of 221435301056 in words is "two hundred twenty-one billion, four hundred thirty-five million, three hundred one thousand, fifty-six".