2231322157 has 2 divisors, whose sum is σ = 2231322158. Its totient is φ = 2231322156.

The previous prime is 2231322127. The next prime is 2231322169. The reversal of 2231322157 is 7512231322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2159089156 + 72233001 = 46466^2 + 8499^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231322157 - 2¹¹ = 2231320109 is a prime.

It is a super-3 number, since 3×2231322157³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231322127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115661078 + 1115661079.

It is an arithmetic number, because the mean of its divisors is an integer number (1115661079).

Almost surely, 2^2231322157 is an apocalyptic number.

It is an amenable number.

2231322157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231322157 is an equidigital number, since it uses as much as digits as its factorization.

2231322157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 2231322157 is about 47236.8728537358. The cubic root of 2231322157 is about 1306.7347065243.

Adding to 2231322157 its reverse (7512231322), we get a palindrome (9743553479).

The spelling of 2231322157 in words is "two billion, two hundred thirty-one million, three hundred twenty-two thousand, one hundred fifty-seven".