51985963 has 2 divisors, whose sum is σ = 51985964. Its totient is φ = 51985962.

The previous prime is 51985943. The next prime is 51985979. The reversal of 51985963 is 36958915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51985963 - 2¹³ = 51977771 is a prime.

It is not a weakly prime, because it can be changed into another prime (51985943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25992981 + 25992982.

It is an arithmetic number, because the mean of its divisors is an integer number (25992982).

Almost surely, 2^51985963 is an apocalyptic number.

51985963 is a deficient number, since it is larger than the sum of its proper divisors (1).

51985963 is an equidigital number, since it uses as much as digits as its factorization.

51985963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 46.

The square root of 51985963 is about 7210.1291944042. The cubic root of 51985963 is about 373.2175272367.

The spelling of 51985963 in words is "fifty-one million, nine hundred eighty-five thousand, nine hundred sixty-three".