51363889 has 2 divisors, whose sum is σ = 51363890. Its totient is φ = 51363888.

The previous prime is 51363877. The next prime is 51363913. The reversal of 51363889 is 98836315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 1520289 = 7060^2 + 1233^2 .

It is a cyclic number.

It is not a de Polignac number, because 51363889 - 2¹⁷ = 51232817 is a prime.

It is not a weakly prime, because it can be changed into another prime (51363989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25681944 + 25681945.

It is an arithmetic number, because the mean of its divisors is an integer number (25681945).

Almost surely, 2^51363889 is an apocalyptic number.

It is an amenable number.

51363889 is a deficient number, since it is larger than the sum of its proper divisors (1).

51363889 is an equidigital number, since it uses as much as digits as its factorization.

51363889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 51363889 is about 7166.8604702478. The cubic root of 51363889 is about 371.7228854031.

It can be divided in two parts, 5136 and 3889, that added together give a square (9025 = 95²).

The spelling of 51363889 in words is "fifty-one million, three hundred sixty-three thousand, eight hundred eighty-nine".