51132449 has 2 divisors, whose sum is σ = 51132450. Its totient is φ = 51132448.

The previous prime is 51132397. The next prime is 51132451. The reversal of 51132449 is 94423115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45468049 + 5664400 = 6743^2 + 2380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51132449 is a prime.

It is a super-2 number, since 2×51132449² = 5229054681475202, which contains 22 as substring.

Together with 51132451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51132049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25566224 + 25566225.

It is an arithmetic number, because the mean of its divisors is an integer number (25566225).

Almost surely, 2^51132449 is an apocalyptic number.

It is an amenable number.

51132449 is a deficient number, since it is larger than the sum of its proper divisors (1).

51132449 is an equidigital number, since it uses as much as digits as its factorization.

51132449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 51132449 is about 7150.6957004196. The cubic root of 51132449 is about 371.1637306680.

The spelling of 51132449 in words is "fifty-one million, one hundred thirty-two thousand, four hundred forty-nine".