51091829 has 2 divisors, whose sum is σ = 51091830. Its totient is φ = 51091828.

The previous prime is 51091793. The next prime is 51091837. The reversal of 51091829 is 92819015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 40804 = 7145^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 51091829 - 2¹² = 51087733 is a prime.

It is a super-2 number, since 2×51091829² = 5220749981130482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51091129) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25545914 + 25545915.

It is an arithmetic number, because the mean of its divisors is an integer number (25545915).

Almost surely, 2^51091829 is an apocalyptic number.

It is an amenable number.

51091829 is a deficient number, since it is larger than the sum of its proper divisors (1).

51091829 is an equidigital number, since it uses as much as digits as its factorization.

51091829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 51091829 is about 7147.8548530311. The cubic root of 51091829 is about 371.0654195489.

The spelling of 51091829 in words is "fifty-one million, ninety-one thousand, eight hundred twenty-nine".