51936397 has 2 divisors, whose sum is σ = 51936398. Its totient is φ = 51936396.

The previous prime is 51936383. The next prime is 51936407. The reversal of 51936397 is 79363915.

It is a happy number.

51936397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50893956 + 1042441 = 7134^2 + 1021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51936397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51936097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25968198 + 25968199.

It is an arithmetic number, because the mean of its divisors is an integer number (25968199).

Almost surely, 2^51936397 is an apocalyptic number.

It is an amenable number.

51936397 is a deficient number, since it is larger than the sum of its proper divisors (1).

51936397 is an equidigital number, since it uses as much as digits as its factorization.

51936397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153090, while the sum is 43.

The square root of 51936397 is about 7206.6911270014. The cubic root of 51936397 is about 373.0988748079.

The spelling of 51936397 in words is "fifty-one million, nine hundred thirty-six thousand, three hundred ninety-seven".