51538049 has 2 divisors, whose sum is σ = 51538050. Its totient is φ = 51538048.

The previous prime is 51538043. The next prime is 51538063. The reversal of 51538049 is 94083515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32001649 + 19536400 = 5657^2 + 4420^2 .

It is a cyclic number.

It is not a de Polignac number, because 51538049 - 2²⁴ = 34760833 is a prime.

It is a Chen prime.

It is equal to p_3087791 and since 51538049 and 3087791 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51538043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25769024 + 25769025.

It is an arithmetic number, because the mean of its divisors is an integer number (25769025).

Almost surely, 2^51538049 is an apocalyptic number.

It is an amenable number.

51538049 is a deficient number, since it is larger than the sum of its proper divisors (1).

51538049 is an equidigital number, since it uses as much as digits as its factorization.

51538049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 51538049 is about 7179.0005571806. Note that the first 3 decimals coincide. The cubic root of 51538049 is about 372.1425461533.

The spelling of 51538049 in words is "fifty-one million, five hundred thirty-eight thousand, forty-nine".