51163309 has 2 divisors, whose sum is σ = 51163310. Its totient is φ = 51163308.

The previous prime is 51163297. The next prime is 51163327. The reversal of 51163309 is 90336115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45185284 + 5978025 = 6722^2 + 2445^2 .

It is a cyclic number.

It is not a de Polignac number, because 51163309 - 2¹¹ = 51161261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51163369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25581654 + 25581655.

It is an arithmetic number, because the mean of its divisors is an integer number (25581655).

Almost surely, 2^51163309 is an apocalyptic number.

It is an amenable number.

51163309 is a deficient number, since it is larger than the sum of its proper divisors (1).

51163309 is an equidigital number, since it uses as much as digits as its factorization.

51163309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 51163309 is about 7152.8532069378. The cubic root of 51163309 is about 371.2383852133.

The spelling of 51163309 in words is "fifty-one million, one hundred sixty-three thousand, three hundred nine".