51346643 has 2 divisors, whose sum is σ = 51346644. Its totient is φ = 51346642.

The previous prime is 51346627. The next prime is 51346657. The reversal of 51346643 is 34664315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51346643 - 2⁴ = 51346627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51346543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25673321 + 25673322.

It is an arithmetic number, because the mean of its divisors is an integer number (25673322).

Almost surely, 2^51346643 is an apocalyptic number.

51346643 is a deficient number, since it is larger than the sum of its proper divisors (1).

51346643 is an equidigital number, since it uses as much as digits as its factorization.

51346643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 32.

The square root of 51346643 is about 7165.6571924702. The cubic root of 51346643 is about 371.6812773743.

The spelling of 51346643 in words is "fifty-one million, three hundred forty-six thousand, six hundred forty-three".