172150681 has 4 divisors (see below), whose sum is σ = 172197172. Its totient is φ = 172104192.

The previous prime is 172150673. The next prime is 172150733. The reversal of 172150681 is 186051271.

172150681 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 can be written as a sum of positive squares in 2 ways, for example, as 93296281 + 78854400 = 9659^2 + 8880^2 .

It is a cyclic number.

It is not a de Polignac number, because 172150681 - 2³ = 172150673 is a prime.

It is a super-2 number, since 2×172150681² = 59271713937527522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172150661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17160 + ... + 25273.

It is an arithmetic number, because the mean of its divisors is an integer number (43049293).

Almost surely, 2^172150681 is an apocalyptic number.

It is an amenable number.

172150681 is a deficient number, since it is larger than the sum of its proper divisors (46491).

172150681 is an equidigital number, since it uses as much as digits as its factorization.

172150681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46490.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 172150681 is about 13120.6204502683. The cubic root of 172150681 is about 556.2921288464.

The spelling of 172150681 in words is "one hundred seventy-two million, one hundred fifty thousand, six hundred eighty-one".