51822857 has 2 divisors, whose sum is σ = 51822858. Its totient is φ = 51822856.

The previous prime is 51822847. The next prime is 51822877. The reversal of 51822857 is 75822815.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35331136 + 16491721 = 5944^2 + 4061^2 .

It is a cyclic number.

It is not a de Polignac number, because 51822857 - 2⁸ = 51822601 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51822857.

It is not a weakly prime, because it can be changed into another prime (51822847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25911428 + 25911429.

It is an arithmetic number, because the mean of its divisors is an integer number (25911429).

Almost surely, 2^51822857 is an apocalyptic number.

It is an amenable number.

51822857 is a deficient number, since it is larger than the sum of its proper divisors (1).

51822857 is an equidigital number, since it uses as much as digits as its factorization.

51822857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44800, while the sum is 38.

The square root of 51822857 is about 7198.8094154520. The cubic root of 51822857 is about 372.8267948814.

The spelling of 51822857 in words is "fifty-one million, eight hundred twenty-two thousand, eight hundred fifty-seven".