51098857 has 2 divisors, whose sum is σ = 51098858. Its totient is φ = 51098856.

The previous prime is 51098851. The next prime is 51098863. The reversal of 51098857 is 75889015.

It is a balanced prime because it is at equal distance from previous prime (51098851) and next prime (51098863).

It can be written as a sum of positive squares in only one way, i.e., 50993881 + 104976 = 7141^2 + 324^2 .

It is a cyclic number.

It is not a de Polignac number, because 51098857 - 2³ = 51098849 is a prime.

It is a super-2 number, since 2×51098857² = 5222186373412898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51098851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25549428 + 25549429.

It is an arithmetic number, because the mean of its divisors is an integer number (25549429).

Almost surely, 2^51098857 is an apocalyptic number.

It is an amenable number.

51098857 is a deficient number, since it is larger than the sum of its proper divisors (1).

51098857 is an equidigital number, since it uses as much as digits as its factorization.

51098857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 51098857 is about 7148.3464521524. The cubic root of 51098857 is about 371.0824328904.

The spelling of 51098857 in words is "fifty-one million, ninety-eight thousand, eight hundred fifty-seven".