51262489 has 2 divisors, whose sum is σ = 51262490. Its totient is φ = 51262488.

The previous prime is 51262447. The next prime is 51262511. The reversal of 51262489 is 98426215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40106889 + 11155600 = 6333^2 + 3340^2 .

It is a cyclic number.

It is not a de Polignac number, because 51262489 - 2¹³ = 51254297 is a prime.

It is not a weakly prime, because it can be changed into another prime (51262439) 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, 25631244 + 25631245.

It is an arithmetic number, because the mean of its divisors is an integer number (25631245).

Almost surely, 2^51262489 is an apocalyptic number.

It is an amenable number.

51262489 is a deficient number, since it is larger than the sum of its proper divisors (1).

51262489 is an equidigital number, since it uses as much as digits as its factorization.

51262489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 51262489 is about 7159.7827481007. The cubic root of 51262489 is about 371.4781120663.

It can be divided in two parts, 512 and 62489, that added together give a square (63001 = 251²).

The spelling of 51262489 in words is "fifty-one million, two hundred sixty-two thousand, four hundred eighty-nine".