7115889281 has 4 divisors (see below), whose sum is σ = 7120689072. Its totient is φ = 7111089492.

The previous prime is 7115889241. The next prime is 7115889289. The reversal of 7115889281 is 1829885117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7115889281 - 2¹⁰ = 7115888257 is a prime.

It is a super-2 number, since 2×7115889281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7115889289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2397671 + ... + 2400636.

It is an arithmetic number, because the mean of its divisors is an integer number (1780172268).

Almost surely, 2^7115889281 is an apocalyptic number.

It is an amenable number.

7115889281 is a deficient number, since it is larger than the sum of its proper divisors (4799791).

7115889281 is a wasteful number, since it uses less digits than its factorization.

7115889281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4799790.

The product of its digits is 322560, while the sum is 50.

The square root of 7115889281 is about 84355.7305759366. The cubic root of 7115889281 is about 1923.4300377360.

The spelling of 7115889281 in words is "seven billion, one hundred fifteen million, eight hundred eighty-nine thousand, two hundred eighty-one".