172051720051 has 2 divisors, whose sum is σ = 172051720052. Its totient is φ = 172051720050.

The previous prime is 172051720039. The next prime is 172051720063. The reversal of 172051720051 is 150027150271.

172051720051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (172051720039) and next prime (172051720063).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172051720051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172051719995 and 172051720022.

It is not a weakly prime, because it can be changed into another prime (172051724051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86025860025 + 86025860026.

It is an arithmetic number, because the mean of its divisors is an integer number (86025860026).

Almost surely, 2^172051720051 is an apocalyptic number.

172051720051 is a deficient number, since it is larger than the sum of its proper divisors (1).

172051720051 is an equidigital number, since it uses as much as digits as its factorization.

172051720051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4900, while the sum is 31.

The spelling of 172051720051 in words is "one hundred seventy-two billion, fifty-one million, seven hundred twenty thousand, fifty-one".