51544109 has 2 divisors, whose sum is σ = 51544110. Its totient is φ = 51544108.

The previous prime is 51544091. The next prime is 51544121. The reversal of 51544109 is 90144515.

Together with previous prime (51544091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29735209 + 21808900 = 5453^2 + 4670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51544109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51544189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25772054 + 25772055.

It is an arithmetic number, because the mean of its divisors is an integer number (25772055).

Almost surely, 2^51544109 is an apocalyptic number.

It is an amenable number.

51544109 is a deficient number, since it is larger than the sum of its proper divisors (1).

51544109 is an equidigital number, since it uses as much as digits as its factorization.

51544109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 51544109 is about 7179.4226090961. The cubic root of 51544109 is about 372.1571314645.

The spelling of 51544109 in words is "fifty-one million, five hundred forty-four thousand, one hundred nine".