51814661 has 2 divisors, whose sum is σ = 51814662. Its totient is φ = 51814660.

The previous prime is 51814649. The next prime is 51814669. The reversal of 51814661 is 16641815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33709636 + 18105025 = 5806^2 + 4255^2 .

It is a cyclic number.

It is not a de Polignac number, because 51814661 - 2²² = 47620357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51814669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25907330 + 25907331.

It is an arithmetic number, because the mean of its divisors is an integer number (25907331).

Almost surely, 2^51814661 is an apocalyptic number.

It is an amenable number.

51814661 is a deficient number, since it is larger than the sum of its proper divisors (1).

51814661 is an equidigital number, since it uses as much as digits as its factorization.

51814661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The square root of 51814661 is about 7198.2401321434. The cubic root of 51814661 is about 372.8071391433.

The spelling of 51814661 in words is "fifty-one million, eight hundred fourteen thousand, six hundred sixty-one".