51574661 has 2 divisors, whose sum is σ = 51574662. Its totient is φ = 51574660.

The previous prime is 51574643. The next prime is 51574681. The reversal of 51574661 is 16647515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30184036 + 21390625 = 5494^2 + 4625^2 .

It is a cyclic number.

It is not a de Polignac number, because 51574661 - 2¹⁴ = 51558277 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51574681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25787330 + 25787331.

It is an arithmetic number, because the mean of its divisors is an integer number (25787331).

Almost surely, 2^51574661 is an apocalyptic number.

It is an amenable number.

51574661 is a deficient number, since it is larger than the sum of its proper divisors (1).

51574661 is an equidigital number, since it uses as much as digits as its factorization.

51574661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 51574661 is about 7181.5500415997. The cubic root of 51574661 is about 372.2306471332.

The spelling of 51574661 in words is "fifty-one million, five hundred seventy-four thousand, six hundred sixty-one".