2261557 has 2 divisors, whose sum is σ = 2261558. Its totient is φ = 2261556.

The previous prime is 2261549. The next prime is 2261569. The reversal of 2261557 is 7551622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2208196 + 53361 = 1486^2 + 231^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261557 - 2³ = 2261549 is a prime.

It is a super-2 number, since 2×2261557² = 10229280128498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130778 + 1130779.

It is an arithmetic number, because the mean of its divisors is an integer number (1130779).

2^2261557 is an apocalyptic number.

It is an amenable number.

2261557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261557 is an equidigital number, since it uses as much as digits as its factorization.

2261557 is an evil number, because the sum of its binary digits is even.

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

The square root of 2261557 is about 1503.8473991732. The cubic root of 2261557 is about 131.2610415503.

The spelling of 2261557 in words is "two million, two hundred sixty-one thousand, five hundred fifty-seven".