11297857281 has 16 divisors (see below), whose sum is σ = 15499323840. Its totient is φ = 7316084160.

The previous prime is 11297857267. The next prime is 11297857309. The reversal of 11297857281 is 18275879211.

It is not a de Polignac number, because 11297857281 - 2¹⁰ = 11297856257 is a prime.

It is a super-2 number, since 2×11297857281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11297857211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218586 + ... + 265283.

It is an arithmetic number, because the mean of its divisors is an integer number (968707740).

Almost surely, 2^11297857281 is an apocalyptic number.

It is an amenable number.

11297857281 is a deficient number, since it is larger than the sum of its proper divisors (4201466559).

11297857281 is a wasteful number, since it uses less digits than its factorization.

11297857281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484096.

The product of its digits is 564480, while the sum is 51.

The spelling of 11297857281 in words is "eleven billion, two hundred ninety-seven million, eight hundred fifty-seven thousand, two hundred eighty-one".