51098851 has 2 divisors, whose sum is σ = 51098852. Its totient is φ = 51098850.

The previous prime is 51098849. The next prime is 51098857. The reversal of 51098851 is 15889015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51098851 - 2¹ = 51098849 is a prime.

It is a super-2 number, since 2×51098851² = 5222185147040402, which contains 22 as substring.

Together with 51098849, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51098851.

It is not a weakly prime, because it can be changed into another prime (51098857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25549425 + 25549426.

It is an arithmetic number, because the mean of its divisors is an integer number (25549426).

Almost surely, 2^51098851 is an apocalyptic number.

51098851 is a deficient number, since it is larger than the sum of its proper divisors (1).

51098851 is an equidigital number, since it uses as much as digits as its factorization.

51098851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 51098851 is about 7148.3460324749. The cubic root of 51098851 is about 371.0824183663.

The spelling of 51098851 in words is "fifty-one million, ninety-eight thousand, eight hundred fifty-one".