51113549 has 2 divisors, whose sum is σ = 51113550. Its totient is φ = 51113548.

The previous prime is 51113533. The next prime is 51113551. The reversal of 51113549 is 94531115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33431524 + 17682025 = 5782^2 + 4205^2 .

It is a cyclic number.

It is not a de Polignac number, because 51113549 - 2⁴ = 51113533 is a prime.

It is a super-2 number, since 2×51113549² = 5225189782750802, which contains 22 as substring.

Together with 51113551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51113599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25556774 + 25556775.

It is an arithmetic number, because the mean of its divisors is an integer number (25556775).

Almost surely, 2^51113549 is an apocalyptic number.

It is an amenable number.

51113549 is a deficient number, since it is larger than the sum of its proper divisors (1).

51113549 is an equidigital number, since it uses as much as digits as its factorization.

51113549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 29.

The square root of 51113549 is about 7149.3740285426. The cubic root of 51113549 is about 371.1179941599.

The spelling of 51113549 in words is "fifty-one million, one hundred thirteen thousand, five hundred forty-nine".