51547369 has 2 divisors, whose sum is σ = 51547370. Its totient is φ = 51547368.

The previous prime is 51547367. The next prime is 51547459. The reversal of 51547369 is 96374515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41434969 + 10112400 = 6437^2 + 3180^2 .

It is a cyclic number.

It is not a de Polignac number, because 51547369 - 2¹ = 51547367 is a prime.

It is a super-3 number, since 3×51547369³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 51547367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51547367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25773684 + 25773685.

It is an arithmetic number, because the mean of its divisors is an integer number (25773685).

Almost surely, 2^51547369 is an apocalyptic number.

It is an amenable number.

51547369 is a deficient number, since it is larger than the sum of its proper divisors (1).

51547369 is an equidigital number, since it uses as much as digits as its factorization.

51547369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 40.

The square root of 51547369 is about 7179.6496432625. The cubic root of 51547369 is about 372.1649772151.

The spelling of 51547369 in words is "fifty-one million, five hundred forty-seven thousand, three hundred sixty-nine".