51049081 has 2 divisors, whose sum is σ = 51049082. Its totient is φ = 51049080.

The previous prime is 51049057. The next prime is 51049093. The reversal of 51049081 is 18094015.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41538025 + 9511056 = 6445^2 + 3084^2 .

It is a cyclic number.

It is not a de Polignac number, because 51049081 - 2⁵ = 51049049 is a prime.

It is a super-2 number, since 2×51049081² = 5212017341889122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51049051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25524540 + 25524541.

It is an arithmetic number, because the mean of its divisors is an integer number (25524541).

Almost surely, 2^51049081 is an apocalyptic number.

It is an amenable number.

51049081 is a deficient number, since it is larger than the sum of its proper divisors (1).

51049081 is an equidigital number, since it uses as much as digits as its factorization.

51049081 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 28.

The square root of 51049081 is about 7144.8639595167. The cubic root of 51049081 is about 370.9619018184.

The spelling of 51049081 in words is "fifty-one million, forty-nine thousand, eighty-one".