2122031557 has 2 divisors, whose sum is σ = 2122031558. Its totient is φ = 2122031556.

The previous prime is 2122031551. The next prime is 2122031567. The reversal of 2122031557 is 7551302212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2108738241 + 13293316 = 45921^2 + 3646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122031557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122031551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061015778 + 1061015779.

It is an arithmetic number, because the mean of its divisors is an integer number (1061015779).

Almost surely, 2^2122031557 is an apocalyptic number.

It is an amenable number.

2122031557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122031557 is an equidigital number, since it uses as much as digits as its factorization.

2122031557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 2122031557 is about 46065.5137494417. The cubic root of 2122031557 is about 1285.0418730015.

Adding to 2122031557 its reverse (7551302212), we get a palindrome (9673333769).

The spelling of 2122031557 in words is "two billion, one hundred twenty-two million, thirty-one thousand, five hundred fifty-seven".