206157049 has 8 divisors (see below), whose sum is σ = 248008640. Its totient is φ = 167405616.

The previous prime is 206157047. The next prime is 206157053. The reversal of 206157049 is 940751602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206157049 - 2¹ = 206157047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206157047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774894 + ... + 775159.

It is an arithmetic number, because the mean of its divisors is an integer number (31001080).

Almost surely, 2^206157049 is an apocalyptic number.

It is an amenable number.

206157049 is a deficient number, since it is larger than the sum of its proper divisors (41851591).

206157049 is a wasteful number, since it uses less digits than its factorization.

206157049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550079.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 206157049 is about 14358.1701132143. The cubic root of 206157049 is about 590.7441047146.

The spelling of 206157049 in words is "two hundred six million, one hundred fifty-seven thousand, forty-nine".