51971713 has 2 divisors, whose sum is σ = 51971714. Its totient is φ = 51971712.

The previous prime is 51971701. The next prime is 51971729. The reversal of 51971713 is 31717915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49730704 + 2241009 = 7052^2 + 1497^2 .

It is a cyclic number.

It is not a de Polignac number, because 51971713 - 2⁵ = 51971681 is a prime.

It is not a weakly prime, because it can be changed into another prime (51971753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25985856 + 25985857.

It is an arithmetic number, because the mean of its divisors is an integer number (25985857).

Almost surely, 2^51971713 is an apocalyptic number.

It is an amenable number.

51971713 is a deficient number, since it is larger than the sum of its proper divisors (1).

51971713 is an equidigital number, since it uses as much as digits as its factorization.

51971713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6615, while the sum is 34.

The square root of 51971713 is about 7209.1409335648. The cubic root of 51971713 is about 373.1834229294.

The spelling of 51971713 in words is "fifty-one million, nine hundred seventy-one thousand, seven hundred thirteen".