206552531 has 8 divisors (see below), whose sum is σ = 209425920. Its totient is φ = 203685768.

The previous prime is 206552519. The next prime is 206552539. The reversal of 206552531 is 135255602.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206552531 is a prime.

It is a super-2 number, since 2×206552531² = 85327896125011922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206552494 and 206552503.

It is not an unprimeable number, because it can be changed into a prime (206552539) 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, 126140 + ... + 127766.

It is an arithmetic number, because the mean of its divisors is an integer number (26178240).

Almost surely, 2^206552531 is an apocalyptic number.

206552531 is a deficient number, since it is larger than the sum of its proper divisors (2873389).

206552531 is a wasteful number, since it uses less digits than its factorization.

206552531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 206552531 is about 14371.9355342278. The cubic root of 206552531 is about 591.1216153327.

The spelling of 206552531 in words is "two hundred six million, five hundred fifty-two thousand, five hundred thirty-one".