2131233157 has 2 divisors, whose sum is σ = 2131233158. Its totient is φ = 2131233156.

The previous prime is 2131233121. The next prime is 2131233241. The reversal of 2131233157 is 7513321312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1417221316 + 714011841 = 37646^2 + 26721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131233157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131233457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065616578 + 1065616579.

It is an arithmetic number, because the mean of its divisors is an integer number (1065616579).

Almost surely, 2^2131233157 is an apocalyptic number.

It is an amenable number.

2131233157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131233157 is an equidigital number, since it uses as much as digits as its factorization.

2131233157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 28.

The square root of 2131233157 is about 46165.2808612706. The cubic root of 2131233157 is about 1286.8966037004.

Adding to 2131233157 its reverse (7513321312), we get a palindrome (9644554469).

The spelling of 2131233157 in words is "two billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred fifty-seven".