206722971 has 24 divisors (see below), whose sum is σ = 367508960. Its totient is φ = 109040256.

The previous prime is 206722951. The next prime is 206722981. The reversal of 206722971 is 179227602.

It is not a de Polignac number, because 206722971 - 2¹⁸ = 206460827 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (206722921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125386 + ... + 127023.

Almost surely, 2^206722971 is an apocalyptic number.

206722971 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

206722971 is a deficient number, since it is larger than the sum of its proper divisors (160785989).

206722971 is a wasteful number, since it uses less digits than its factorization.

206722971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252435 (or 252432 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 206722971 is about 14377.8639234067. The cubic root of 206722971 is about 591.2841616646.

The spelling of 206722971 in words is "two hundred six million, seven hundred twenty-two thousand, nine hundred seventy-one".