51259643 has 2 divisors, whose sum is σ = 51259644. Its totient is φ = 51259642.

The previous prime is 51259633. The next prime is 51259669. The reversal of 51259643 is 34695215.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51259643 is a prime.

It is not a weakly prime, because it can be changed into another prime (51259603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25629821 + 25629822.

It is an arithmetic number, because the mean of its divisors is an integer number (25629822).

Almost surely, 2^51259643 is an apocalyptic number.

51259643 is a deficient number, since it is larger than the sum of its proper divisors (1).

51259643 is an equidigital number, since it uses as much as digits as its factorization.

51259643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 35.

The square root of 51259643 is about 7159.5839962948. The cubic root of 51259643 is about 371.4712373431.

The spelling of 51259643 in words is "fifty-one million, two hundred fifty-nine thousand, six hundred forty-three".