231320222541 has 6 divisors (see below), whose sum is σ = 334129210350. Its totient is φ = 154213481688.

The previous prime is 231320222531. The next prime is 231320222543. The reversal of 231320222541 is 145222023132.

231320222541 is a `hidden beast` number, since 231 + 3 + 202 + 225 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 227549034441 + 3771188100 = 477021^2 + 61410^2 .

It is not a de Polignac number, because 231320222541 - 2¹⁵ = 231320189773 is a prime.

It is a super-3 number, since 3×231320222541³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

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 5 ways as a sum of consecutive naturals, for example, 12851123466 + ... + 12851123483.

It is an arithmetic number, because the mean of its divisors is an integer number (55688201725).

Almost surely, 2^231320222541 is an apocalyptic number.

It is an amenable number.

231320222541 is a deficient number, since it is larger than the sum of its proper divisors (102808987809).

231320222541 is a wasteful number, since it uses less digits than its factorization.

231320222541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25702246955 (or 25702246952 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 231320222541 its reverse (145222023132), we get a palindrome (376542245673).

The spelling of 231320222541 in words is "two hundred thirty-one billion, three hundred twenty million, two hundred twenty-two thousand, five hundred forty-one".