51072449 has 2 divisors, whose sum is σ = 51072450. Its totient is φ = 51072448.

The previous prime is 51072391. The next prime is 51072467. The reversal of 51072449 is 94427015.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50865424 + 207025 = 7132^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 51072449 - 2⁸ = 51072193 is a prime.

It is not a weakly prime, because it can be changed into another prime (51072349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25536224 + 25536225.

It is an arithmetic number, because the mean of its divisors is an integer number (25536225).

Almost surely, 2^51072449 is an apocalyptic number.

It is an amenable number.

51072449 is a deficient number, since it is larger than the sum of its proper divisors (1).

51072449 is an equidigital number, since it uses as much as digits as its factorization.

51072449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 51072449 is about 7146.4990729727. The cubic root of 51072449 is about 371.0184964732.

The spelling of 51072449 in words is "fifty-one million, seventy-two thousand, four hundred forty-nine".