206154172 has 36 divisors (see below), whose sum is σ = 444364704. Its totient is φ = 83153280.

The previous prime is 206154133. The next prime is 206154181. The reversal of 206154172 is 271451602.

206154172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 206154172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27604 + ... + 34267.

It is an arithmetic number, because the mean of its divisors is an integer number (12343464).

Almost surely, 2^206154172 is an apocalyptic number.

It is an amenable number.

206154172 is an abundant number, since it is smaller than the sum of its proper divisors (238210532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206154172 is a wasteful number, since it uses less digits than its factorization.

206154172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61906 (or 61897 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 206154172 is about 14358.0699260033. The cubic root of 206154172 is about 590.7413566823.

The spelling of 206154172 in words is "two hundred six million, one hundred fifty-four thousand, one hundred seventy-two".