51862397 has 2 divisors, whose sum is σ = 51862398. Its totient is φ = 51862396.

The previous prime is 51862387. The next prime is 51862399. The reversal of 51862397 is 79326815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32024281 + 19838116 = 5659^2 + 4454^2 .

It is a cyclic number.

It is not a de Polignac number, because 51862397 - 2⁶ = 51862333 is a prime.

Together with 51862399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51862399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25931198 + 25931199.

It is an arithmetic number, because the mean of its divisors is an integer number (25931199).

Almost surely, 2^51862397 is an apocalyptic number.

It is an amenable number.

51862397 is a deficient number, since it is larger than the sum of its proper divisors (1).

51862397 is an equidigital number, since it uses as much as digits as its factorization.

51862397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 51862397 is about 7201.5551792651. Note that the first 3 decimals coincide. The cubic root of 51862397 is about 372.9215910436.

The spelling of 51862397 in words is "fifty-one million, eight hundred sixty-two thousand, three hundred ninety-seven".