172855012 has 48 divisors (see below), whose sum is σ = 341332992. Its totient is φ = 75912480.

The previous prime is 172854973. The next prime is 172855019. The reversal of 172855012 is 210558271.

172855012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172855019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194433 + ... + 195319.

It is an arithmetic number, because the mean of its divisors is an integer number (7111104).

Almost surely, 2^172855012 is an apocalyptic number.

It is an amenable number.

172855012 is a deficient number, since it is larger than the sum of its proper divisors (168477980).

172855012 is a wasteful number, since it uses less digits than its factorization.

172855012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048 (or 1046 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 172855012 is about 13147.4336659289. The cubic root of 172855012 is about 557.0497609578.

The spelling of 172855012 in words is "one hundred seventy-two million, eight hundred fifty-five thousand, twelve".