206001232531 has 4 divisors (see below), whose sum is σ = 206037640600. Its totient is φ = 205964824464.

The previous prime is 206001232517. The next prime is 206001232543. The reversal of 206001232531 is 135232100602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206001232531 - 2¹¹ = 206001230483 is a prime.

It is a super-2 number, since 2×206001232531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206001232496 and 206001232505.

It is not an unprimeable number, because it can be changed into a prime (206001232561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18195546 + ... + 18206863.

It is an arithmetic number, because the mean of its divisors is an integer number (51509410150).

Almost surely, 2^206001232531 is an apocalyptic number.

206001232531 is a deficient number, since it is larger than the sum of its proper divisors (36408069).

206001232531 is an equidigital number, since it uses as much as digits as its factorization.

206001232531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36408068.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 206001232531 in words is "two hundred six billion, one million, two hundred thirty-two thousand, five hundred thirty-one".