206551147 has 16 divisors (see below), whose sum is σ = 237841920. Its totient is φ = 177400800.

The previous prime is 206551133. The next prime is 206551181. The reversal of 206551147 is 741155602.

It is a cyclic number.

It is not a de Polignac number, because 206551147 - 2⁷ = 206551019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206551127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88933 + ... + 91225.

It is an arithmetic number, because the mean of its divisors is an integer number (14865120).

Almost surely, 2^206551147 is an apocalyptic number.

206551147 is a deficient number, since it is larger than the sum of its proper divisors (31290773).

206551147 is a wasteful number, since it uses less digits than its factorization.

206551147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 206551147 is about 14371.8873847522. The cubic root of 206551147 is about 591.1202950646.

The spelling of 206551147 in words is "two hundred six million, five hundred fifty-one thousand, one hundred forty-seven".