51420890107 has 2 divisors, whose sum is σ = 51420890108. Its totient is φ = 51420890106.

The previous prime is 51420890099. The next prime is 51420890113. The reversal of 51420890107 is 70109802415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51420890107 - 2³ = 51420890099 is a prime.

It is not a weakly prime, because it can be changed into another prime (51420890117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25710445053 + 25710445054.

It is an arithmetic number, because the mean of its divisors is an integer number (25710445054).

Almost surely, 2^51420890107 is an apocalyptic number.

51420890107 is a deficient number, since it is larger than the sum of its proper divisors (1).

51420890107 is an equidigital number, since it uses as much as digits as its factorization.

51420890107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 51420890107 in words is "fifty-one billion, four hundred twenty million, eight hundred ninety thousand, one hundred seven".