51971701 has 2 divisors, whose sum is σ = 51971702. Its totient is φ = 51971700.

The previous prime is 51971681. The next prime is 51971713. The reversal of 51971701 is 10717915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30802500 + 21169201 = 5550^2 + 4601^2 .

It is a cyclic number.

It is not a de Polignac number, because 51971701 - 2¹⁵ = 51938933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51971201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25985850 + 25985851.

It is an arithmetic number, because the mean of its divisors is an integer number (25985851).

Almost surely, 2^51971701 is an apocalyptic number.

It is an amenable number.

51971701 is a deficient number, since it is larger than the sum of its proper divisors (1).

51971701 is an equidigital number, since it uses as much as digits as its factorization.

51971701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2205, while the sum is 31.

The square root of 51971701 is about 7209.1401012881. The cubic root of 51971701 is about 373.1833942073.

The spelling of 51971701 in words is "fifty-one million, nine hundred seventy-one thousand, seven hundred one".