231222220555 has 8 divisors (see below), whose sum is σ = 284234144544. Its totient is φ = 180466123200.

The previous prime is 231222220543. The next prime is 231222220577. The reversal of 231222220555 is 555022222132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231222220555 - 2¹³ = 231222212363 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563956431 + ... + 563956840.

It is an arithmetic number, because the mean of its divisors is an integer number (35529268068).

Almost surely, 2^231222220555 is an apocalyptic number.

231222220555 is a deficient number, since it is larger than the sum of its proper divisors (53011923989).

231222220555 is a wasteful number, since it uses less digits than its factorization.

231222220555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127913317.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 231222220555 its reverse (555022222132), we get a palindrome (786244442687).

The spelling of 231222220555 in words is "two hundred thirty-one billion, two hundred twenty-two million, two hundred twenty thousand, five hundred fifty-five".