51566449 has 12 divisors (see below), whose sum is σ = 56958580. Its totient is φ = 46648800.

The previous prime is 51566441. The next prime is 51566467. The reversal of 51566449 is 94466515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19847025 + 31719424 = 4455^2 + 5632^2 .

It is not a de Polignac number, because 51566449 - 2³ = 51566441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51566441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26779 + ... + 28639.

Almost surely, 2^51566449 is an apocalyptic number.

It is an amenable number.

51566449 is a deficient number, since it is larger than the sum of its proper divisors (5392131).

51566449 is a wasteful number, since it uses less digits than its factorization.

51566449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112 (or 2101 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 51566449 is about 7180.9782759733. The cubic root of 51566449 is about 372.2108898838.

The spelling of 51566449 in words is "fifty-one million, five hundred sixty-six thousand, four hundred forty-nine".