2261615957 has 2 divisors, whose sum is σ = 2261615958. Its totient is φ = 2261615956.

The previous prime is 2261615903. The next prime is 2261615959. The reversal of 2261615957 is 7595161622.

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., 2015471236 + 246144721 = 44894^2 + 15689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2261615957 is a prime.

It is a super-2 number, since 2×2261615957² = 10229813473914051698, which contains 22 as substring.

Together with 2261615959, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261615959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130807978 + 1130807979.

It is an arithmetic number, because the mean of its divisors is an integer number (1130807979).

Almost surely, 2^2261615957 is an apocalyptic number.

It is an amenable number.

2261615957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261615957 is an equidigital number, since it uses as much as digits as its factorization.

2261615957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 2261615957 is about 47556.4502144557. The cubic root of 2261615957 is about 1312.6218216420.

The spelling of 2261615957 in words is "two billion, two hundred sixty-one million, six hundred fifteen thousand, nine hundred fifty-seven".