51897437 has 2 divisors, whose sum is σ = 51897438. Its totient is φ = 51897436.

The previous prime is 51897427. The next prime is 51897451. The reversal of 51897437 is 73479815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50537881 + 1359556 = 7109^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 51897437 - 2¹² = 51893341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51897427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25948718 + 25948719.

It is an arithmetic number, because the mean of its divisors is an integer number (25948719).

Almost surely, 2^51897437 is an apocalyptic number.

It is an amenable number.

51897437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51897437 is an equidigital number, since it uses as much as digits as its factorization.

51897437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 51897437 is about 7203.9875763358. The cubic root of 51897437 is about 373.0055583078.

The spelling of 51897437 in words is "fifty-one million, eight hundred ninety-seven thousand, four hundred thirty-seven".