2281931557 has 2 divisors, whose sum is σ = 2281931558. Its totient is φ = 2281931556.

The previous prime is 2281931549. The next prime is 2281931569. The reversal of 2281931557 is 7551391822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1365598116 + 916333441 = 36954^2 + 30271^2 .

It is a cyclic number.

It is not a de Polignac number, because 2281931557 - 2³ = 2281931549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2281961557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1140965778 + 1140965779.

It is an arithmetic number, because the mean of its divisors is an integer number (1140965779).

Almost surely, 2^2281931557 is an apocalyptic number.

It is an amenable number.

2281931557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2281931557 is an equidigital number, since it uses as much as digits as its factorization.

2281931557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 2281931557 is about 47769.5672682933. The cubic root of 2281931557 is about 1316.5404428767.

The spelling of 2281931557 in words is "two billion, two hundred eighty-one million, nine hundred thirty-one thousand, five hundred fifty-seven".