201506531 has 4 divisors (see below), whose sum is σ = 205793952. Its totient is φ = 197219112.

The previous prime is 201506527. The next prime is 201506537. The reversal of 201506531 is 135605102.

201506531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 201506531 - 2² = 201506527 is a prime.

It is a super-2 number, since 2×201506531² = 81209764071307922, 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 = 201506497 and 201506506.

It is not an unprimeable number, because it can be changed into a prime (201506537) 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, 2143640 + ... + 2143733.

It is an arithmetic number, because the mean of its divisors is an integer number (51448488).

Almost surely, 2^201506531 is an apocalyptic number.

201506531 is a deficient number, since it is larger than the sum of its proper divisors (4287421).

201506531 is an equidigital number, since it uses as much as digits as its factorization.

201506531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287420.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 201506531 is about 14195.2996093777. The cubic root of 201506531 is about 586.2682505309.

The spelling of 201506531 in words is "two hundred one million, five hundred six thousand, five hundred thirty-one".