2331231222157 has 2 divisors, whose sum is σ = 2331231222158. Its totient is φ = 2331231222156.

The previous prime is 2331231222101. The next prime is 2331231222163. The reversal of 2331231222157 is 7512221321332.

2331231222157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1850391604681 + 480839617476 = 1360291^2 + 693426^2 .

It is a cyclic number.

It is not a de Polignac number, because 2331231222157 - 2²³ = 2331222833549 is a prime.

It is a super-2 number, since 2×2331231222157² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2331231226157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165615611078 + 1165615611079.

It is an arithmetic number, because the mean of its divisors is an integer number (1165615611079).

Almost surely, 2^{2331231222157} is an apocalyptic number.

It is an amenable number.

2331231222157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331231222157 is an equidigital number, since it uses as much as digits as its factorization.

2331231222157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

Adding to 2331231222157 its reverse (7512221321332), we get a palindrome (9843452543489).

The spelling of 2331231222157 in words is "two trillion, three hundred thirty-one billion, two hundred thirty-one million, two hundred twenty-two thousand, one hundred fifty-seven".