51112247 has 2 divisors, whose sum is σ = 51112248. Its totient is φ = 51112246.

The previous prime is 51112219. The next prime is 51112277. The reversal of 51112247 is 74221115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51112247 - 2¹² = 51108151 is a prime.

It is a super-2 number, since 2×51112247² = 5224923586778018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51112277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25556123 + 25556124.

It is an arithmetic number, because the mean of its divisors is an integer number (25556124).

Almost surely, 2^51112247 is an apocalyptic number.

51112247 is a deficient number, since it is larger than the sum of its proper divisors (1).

51112247 is an equidigital number, since it uses as much as digits as its factorization.

51112247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 23.

The square root of 51112247 is about 7149.2829710398. The cubic root of 51112247 is about 371.1148430076.

The spelling of 51112247 in words is "fifty-one million, one hundred twelve thousand, two hundred forty-seven".