51534449 has 2 divisors, whose sum is σ = 51534450. Its totient is φ = 51534448.

The previous prime is 51534407. The next prime is 51534473. The reversal of 51534449 is 94443515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51480625 + 53824 = 7175^2 + 232^2 .

It is a cyclic number.

It is not a de Polignac number, because 51534449 - 2⁸ = 51534193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51530449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25767224 + 25767225.

It is an arithmetic number, because the mean of its divisors is an integer number (25767225).

Almost surely, 2^51534449 is an apocalyptic number.

It is an amenable number.

51534449 is a deficient number, since it is larger than the sum of its proper divisors (1).

51534449 is an equidigital number, since it uses as much as digits as its factorization.

51534449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

The square root of 51534449 is about 7178.7498215219. The cubic root of 51534449 is about 372.1338810707.

The spelling of 51534449 in words is "fifty-one million, five hundred thirty-four thousand, four hundred forty-nine".