51266393 has 2 divisors, whose sum is σ = 51266394. Its totient is φ = 51266392.

The previous prime is 51266387. The next prime is 51266401. The reversal of 51266393 is 39366215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26296384 + 24970009 = 5128^2 + 4997^2 .

It is a cyclic number.

It is not a de Polignac number, because 51266393 - 2¹⁰ = 51265369 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51260393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25633196 + 25633197.

It is an arithmetic number, because the mean of its divisors is an integer number (25633197).

Almost surely, 2^51266393 is an apocalyptic number.

It is an amenable number.

51266393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51266393 is an equidigital number, since it uses as much as digits as its factorization.

51266393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 35.

The square root of 51266393 is about 7160.0553768808. The cubic root of 51266393 is about 371.4875420528.

The spelling of 51266393 in words is "fifty-one million, two hundred sixty-six thousand, three hundred ninety-three".