51112091 has 2 divisors, whose sum is σ = 51112092. Its totient is φ = 51112090.

The previous prime is 51112069. The next prime is 51112151. The reversal of 51112091 is 19021115.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51112091 is a prime.

It is a super-2 number, since 2×51112091² = 5224891692784562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51112291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25556045 + 25556046.

It is an arithmetic number, because the mean of its divisors is an integer number (25556046).

Almost surely, 2^51112091 is an apocalyptic number.

51112091 is a deficient number, since it is larger than the sum of its proper divisors (1).

51112091 is an equidigital number, since it uses as much as digits as its factorization.

51112091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 51112091 is about 7149.2720608465. The cubic root of 51112091 is about 371.1144654466.

The spelling of 51112091 in words is "fifty-one million, one hundred twelve thousand, ninety-one".