51148091 has 2 divisors, whose sum is σ = 51148092. Its totient is φ = 51148090.

The previous prime is 51148061. The next prime is 51148093. The reversal of 51148091 is 19084115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51148091 is a prime.

It is a super-2 number, since 2×51148091² = 5232254425888562, which contains 22 as substring.

Together with 51148093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51148093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25574045 + 25574046.

It is an arithmetic number, because the mean of its divisors is an integer number (25574046).

Almost surely, 2^51148091 is an apocalyptic number.

51148091 is a deficient number, since it is larger than the sum of its proper divisors (1).

51148091 is an equidigital number, since it uses as much as digits as its factorization.

51148091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 51148091 is about 7151.7893565177. The cubic root of 51148091 is about 371.2015745504.

The spelling of 51148091 in words is "fifty-one million, one hundred forty-eight thousand, ninety-one".