172218034 has 4 divisors (see below), whose sum is σ = 258327054. Its totient is φ = 86109016.

The previous prime is 172218019. The next prime is 172218077. The reversal of 172218034 is 430812271.

172218034 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, and also an emirpimes, since its reverse is a distinct semiprime: 430812271 = 5569 ⋅77359.

It can be written as a sum of positive squares in only one way, i.e., 162639009 + 9579025 = 12753^2 + 3095^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172217993 and 172218011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43054507 + ... + 43054510.

Almost surely, 2^172218034 is an apocalyptic number.

172218034 is a deficient number, since it is larger than the sum of its proper divisors (86109020).

172218034 is an equidigital number, since it uses as much as digits as its factorization.

172218034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86109019.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 172218034 is about 13123.1868842900. The cubic root of 172218034 is about 556.3646681246.

The spelling of 172218034 in words is "one hundred seventy-two million, two hundred eighteen thousand, thirty-four".