505100055851 has 2 divisors, whose sum is σ = 505100055852. Its totient is φ = 505100055850.

The previous prime is 505100055821. The next prime is 505100055869. The reversal of 505100055851 is 158550001505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505100055851 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (505100055821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252550027925 + 252550027926.

It is an arithmetic number, because the mean of its divisors is an integer number (252550027926).

Almost surely, 2^505100055851 is an apocalyptic number.

505100055851 is a deficient number, since it is larger than the sum of its proper divisors (1).

505100055851 is an equidigital number, since it uses as much as digits as its factorization.

505100055851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25000, while the sum is 35.

The spelling of 505100055851 in words is "five hundred five billion, one hundred million, fifty-five thousand, eight hundred fifty-one".