51971333 has 2 divisors, whose sum is σ = 51971334. Its totient is φ = 51971332.

The previous prime is 51971281. The next prime is 51971341. The reversal of 51971333 is 33317915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28912129 + 23059204 = 5377^2 + 4802^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51971333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51971333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51971383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25985666 + 25985667.

It is an arithmetic number, because the mean of its divisors is an integer number (25985667).

Almost surely, 2^51971333 is an apocalyptic number.

It is an amenable number.

51971333 is a deficient number, since it is larger than the sum of its proper divisors (1).

51971333 is an equidigital number, since it uses as much as digits as its factorization.

51971333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8505, while the sum is 32.

The square root of 51971333 is about 7209.1145780879. The cubic root of 51971333 is about 373.1825133959.

The spelling of 51971333 in words is "fifty-one million, nine hundred seventy-one thousand, three hundred thirty-three".