206154140 has 24 divisors (see below), whose sum is σ = 433234032. Its totient is φ = 82402560.

The previous prime is 206154133. The next prime is 206154181. The reversal of 206154140 is 41451602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34580 + ... + 40100.

It is an arithmetic number, because the mean of its divisors is an integer number (18051418).

Almost surely, 2^206154140 is an apocalyptic number.

206154140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206154140 is an abundant number, since it is smaller than the sum of its proper divisors (227079892).

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

206154140 is a wasteful number, since it uses less digits than its factorization.

206154140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7397 (or 7395 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 206154140 is about 14358.0688116473. The cubic root of 206154140 is about 590.7413261166.

The spelling of 206154140 in words is "two hundred six million, one hundred fifty-four thousand, one hundred forty".