51147589 has 2 divisors, whose sum is σ = 51147590. Its totient is φ = 51147588.

The previous prime is 51147587. The next prime is 51147659. The reversal of 51147589 is 98574115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41796225 + 9351364 = 6465^2 + 3058^2 .

It is a cyclic number.

It is not a de Polignac number, because 51147589 - 2¹ = 51147587 is a prime.

Together with 51147587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51147581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25573794 + 25573795.

It is an arithmetic number, because the mean of its divisors is an integer number (25573795).

Almost surely, 2^51147589 is an apocalyptic number.

It is an amenable number.

51147589 is a deficient number, since it is larger than the sum of its proper divisors (1).

51147589 is an equidigital number, since it uses as much as digits as its factorization.

51147589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 40.

The square root of 51147589 is about 7151.7542603196. The cubic root of 51147589 is about 371.2003601434.

The spelling of 51147589 in words is "fifty-one million, one hundred forty-seven thousand, five hundred eighty-nine".