2261511297 has 12 divisors (see below), whose sum is σ = 3269784960. Its totient is φ = 1506216888.

The previous prime is 2261511289. The next prime is 2261511331. The reversal of 2261511297 is 7921151622.

2261511297 is a `hidden beast` number, since 2 + 2 + 615 + 11 + 29 + 7 = 666.

It is not a de Polignac number, because 2261511297 - 2³ = 2261511289 is a prime.

It is a super-2 number, since 2×2261511297² = 10228866692917244418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2261511227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111573 + ... + 130274.

It is an arithmetic number, because the mean of its divisors is an integer number (272482080).

Almost surely, 2^2261511297 is an apocalyptic number.

It is an amenable number.

2261511297 is a deficient number, since it is larger than the sum of its proper divisors (1008273663).

2261511297 is a wasteful number, since it uses less digits than its factorization.

2261511297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242892 (or 242889 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 2261511297 is about 47555.3498252300. The cubic root of 2261511297 is about 1312.6015734180.

The spelling of 2261511297 in words is "two billion, two hundred sixty-one million, five hundred eleven thousand, two hundred ninety-seven".