51662291 has 2 divisors, whose sum is σ = 51662292. Its totient is φ = 51662290.

The previous prime is 51662243. The next prime is 51662321. The reversal of 51662291 is 19226615.

It is a happy number.

51662291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51662291 is a prime.

It is a super-2 number, since 2×51662291² = 5337984622737362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51662231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25831145 + 25831146.

It is an arithmetic number, because the mean of its divisors is an integer number (25831146).

Almost surely, 2^51662291 is an apocalyptic number.

51662291 is a deficient number, since it is larger than the sum of its proper divisors (1).

51662291 is an equidigital number, since it uses as much as digits as its factorization.

51662291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 51662291 is about 7187.6485028137. The cubic root of 51662291 is about 372.4413456586.

The spelling of 51662291 in words is "fifty-one million, six hundred sixty-two thousand, two hundred ninety-one".