172485251 has 2 divisors, whose sum is σ = 172485252. Its totient is φ = 172485250.

The previous prime is 172485191. The next prime is 172485277. The reversal of 172485251 is 152584271.

172485251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172485251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172485751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86242625 + 86242626.

It is an arithmetic number, because the mean of its divisors is an integer number (86242626).

Almost surely, 2^172485251 is an apocalyptic number.

172485251 is a deficient number, since it is larger than the sum of its proper divisors (1).

172485251 is an equidigital number, since it uses as much as digits as its factorization.

172485251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 35.

The square root of 172485251 is about 13133.3640397272. The cubic root of 172485251 is about 556.6522749974.

The spelling of 172485251 in words is "one hundred seventy-two million, four hundred eighty-five thousand, two hundred fifty-one".