172249401251 has 4 divisors (see below), whose sum is σ = 176904790512. Its totient is φ = 167594011992.

The previous prime is 172249401239. The next prime is 172249401277. The reversal of 172249401251 is 152104942271.

172249401251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172249401251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172249401281) 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 in 3 ways as a sum of consecutive naturals, for example, 2327694575 + ... + 2327694648.

It is an arithmetic number, because the mean of its divisors is an integer number (44226197628).

Almost surely, 2^172249401251 is an apocalyptic number.

172249401251 is a deficient number, since it is larger than the sum of its proper divisors (4655389261).

172249401251 is an equidigital number, since it uses as much as digits as its factorization.

172249401251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655389260.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 172249401251 in words is "one hundred seventy-two billion, two hundred forty-nine million, four hundred one thousand, two hundred fifty-one".