206747481 has 8 divisors (see below), whose sum is σ = 275735520. Its totient is φ = 137795552.

The previous prime is 206747479. The next prime is 206747507. The reversal of 206747481 is 184747602.

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

It is a cyclic number.

It is not a de Polignac number, because 206747481 - 2¹ = 206747479 is a prime.

It is a super-2 number, since 2×206747481² = 85489041799690722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206747381) 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, 10165 + ... + 22733.

It is an arithmetic number, because the mean of its divisors is an integer number (34466940).

Almost surely, 2^206747481 is an apocalyptic number.

It is an amenable number.

206747481 is a deficient number, since it is larger than the sum of its proper divisors (68988039).

206747481 is a wasteful number, since it uses less digits than its factorization.

206747481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18055.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 206747481 is about 14378.7162500691. The cubic root of 206747481 is about 591.3075291727.

The spelling of 206747481 in words is "two hundred six million, seven hundred forty-seven thousand, four hundred eighty-one".