2261635157 has 2 divisors, whose sum is σ = 2261635158. Its totient is φ = 2261635156.

The previous prime is 2261635081. The next prime is 2261635213. The reversal of 2261635157 is 7515361622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2000683441 + 260951716 = 44729^2 + 16154^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261635157 - 2⁸ = 2261634901 is a prime.

It is a super-2 number, since 2×2261635157² = 10229987166756829298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2261635157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261635357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130817578 + 1130817579.

It is an arithmetic number, because the mean of its divisors is an integer number (1130817579).

Almost surely, 2^2261635157 is an apocalyptic number.

It is an amenable number.

2261635157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261635157 is an equidigital number, since it uses as much as digits as its factorization.

2261635157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 2261635157 is about 47556.6520793884. The cubic root of 2261635157 is about 1312.6255361346.

Adding to 2261635157 its reverse (7515361622), we get a palindrome (9776996779).

The spelling of 2261635157 in words is "two billion, two hundred sixty-one million, six hundred thirty-five thousand, one hundred fifty-seven".