51273889 has 2 divisors, whose sum is σ = 51273890. Its totient is φ = 51273888.

The previous prime is 51273869. The next prime is 51273899. The reversal of 51273889 is 98837215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34398225 + 16875664 = 5865^2 + 4108^2 .

It is a cyclic number.

It is not a de Polignac number, because 51273889 - 2¹⁵ = 51241121 is a 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, 25636944 + 25636945.

It is an arithmetic number, because the mean of its divisors is an integer number (25636945).

Almost surely, 2^51273889 is an apocalyptic number.

It is an amenable number.

51273889 is a deficient number, since it is larger than the sum of its proper divisors (1).

51273889 is an equidigital number, since it uses as much as digits as its factorization.

51273889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 51273889 is about 7160.5788173862. The cubic root of 51273889 is about 371.5056470578.

The spelling of 51273889 in words is "fifty-one million, two hundred seventy-three thousand, eight hundred eighty-nine".