51227149 has 2 divisors, whose sum is σ = 51227150. Its totient is φ = 51227148.

The previous prime is 51227123. The next prime is 51227161. The reversal of 51227149 is 94172215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51194025 + 33124 = 7155^2 + 182^2 .

It is a cyclic number.

It is not a de Polignac number, because 51227149 - 2⁵ = 51227117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51227149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51227119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25613574 + 25613575.

It is an arithmetic number, because the mean of its divisors is an integer number (25613575).

Almost surely, 2^51227149 is an apocalyptic number.

It is an amenable number.

51227149 is a deficient number, since it is larger than the sum of its proper divisors (1).

51227149 is an equidigital number, since it uses as much as digits as its factorization.

51227149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 51227149 is about 7157.3143706281. The cubic root of 51227149 is about 371.3927276414.

The spelling of 51227149 in words is "fifty-one million, two hundred twenty-seven thousand, one hundred forty-nine".