231222220556 has 6 divisors (see below), whose sum is σ = 404638885980. Its totient is φ = 115611110276.

The previous prime is 231222220543. The next prime is 231222220577. The reversal of 231222220556 is 655022222132.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28902777566 + ... + 28902777573.

It is an arithmetic number, because the mean of its divisors is an integer number (67439814330).

Almost surely, 2^231222220556 is an apocalyptic number.

It is an amenable number.

231222220556 is a deficient number, since it is larger than the sum of its proper divisors (173416665424).

231222220556 is a wasteful number, since it uses less digits than its factorization.

231222220556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57805555143 (or 57805555141 counting only the distinct ones).

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

Adding to 231222220556 its reverse (655022222132), we get a palindrome (886244442688).

The spelling of 231222220556 in words is "two hundred thirty-one billion, two hundred twenty-two million, two hundred twenty thousand, five hundred fifty-six".