51273899 has 2 divisors, whose sum is σ = 51273900. Its totient is φ = 51273898.

The previous prime is 51273889. The next prime is 51273917. The reversal of 51273899 is 99837215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51273899 - 2⁸ = 51273643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51273809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25636949 + 25636950.

It is an arithmetic number, because the mean of its divisors is an integer number (25636950).

Almost surely, 2^51273899 is an apocalyptic number.

51273899 is a deficient number, since it is larger than the sum of its proper divisors (1).

51273899 is an equidigital number, since it uses as much as digits as its factorization.

51273899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 51273899 is about 7160.5795156537. The cubic root of 51273899 is about 371.5056712095.

The spelling of 51273899 in words is "fifty-one million, two hundred seventy-three thousand, eight hundred ninety-nine".