221553142430 has 24 divisors (see below), whose sum is σ = 423634145688. Its totient is φ = 83408240768.

The previous prime is 221553142387. The next prime is 221553142451. The reversal of 221553142430 is 34241355122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38328104 + ... + 38333883.

It is an arithmetic number, because the mean of its divisors is an integer number (17651422737).

Almost surely, 2^221553142430 is an apocalyptic number.

221553142430 is a deficient number, since it is larger than the sum of its proper divisors (202081003258).

221553142430 is a wasteful number, since it uses less digits than its factorization.

221553142430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76662028 (or 76662011 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 221553142430 its reverse (34241355122), we get a palindrome (255794497552).

The spelling of 221553142430 in words is "two hundred twenty-one billion, five hundred fifty-three million, one hundred forty-two thousand, four hundred thirty".