231320222542 has 32 divisors (see below), whose sum is σ = 365405644800. Its totient is φ = 109665816288.

The previous prime is 231320222531. The next prime is 231320222543. The reversal of 231320222542 is 245222023132.

It is a self number, because there is not a number n which added to its sum of digits gives 231320222542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231320222543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3329443 + ... + 3398209.

It is an arithmetic number, because the mean of its divisors is an integer number (11418926400).

Almost surely, 2^231320222542 is an apocalyptic number.

231320222542 is a deficient number, since it is larger than the sum of its proper divisors (134085422258).

231320222542 is a wasteful number, since it uses less digits than its factorization.

231320222542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69840.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 231320222542 its reverse (245222023132), we get a palindrome (476542245674).

The spelling of 231320222542 in words is "two hundred thirty-one billion, three hundred twenty million, two hundred twenty-two thousand, five hundred forty-two".