51519953 has 2 divisors, whose sum is σ = 51519954. Its totient is φ = 51519952.

The previous prime is 51519917. The next prime is 51519967. The reversal of 51519953 is 35991515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51437584 + 82369 = 7172^2 + 287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51519953 is a prime.

It is not a weakly prime, because it can be changed into another prime (51519973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25759976 + 25759977.

It is an arithmetic number, because the mean of its divisors is an integer number (25759977).

Almost surely, 2^51519953 is an apocalyptic number.

It is an amenable number.

51519953 is a deficient number, since it is larger than the sum of its proper divisors (1).

51519953 is an equidigital number, since it uses as much as digits as its factorization.

51519953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30375, while the sum is 38.

The square root of 51519953 is about 7177.7401039603. The cubic root of 51519953 is about 372.0989855867.

The spelling of 51519953 in words is "fifty-one million, five hundred nineteen thousand, nine hundred fifty-three".