12201531 has 8 divisors (see below), whose sum is σ = 16421184. Its totient is φ = 8058120.

The previous prime is 12201509. The next prime is 12201557. The reversal of 12201531 is 13510221.

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

It is not a de Polignac number, because 12201531 - 2⁵ = 12201499 is a prime.

It is a super-2 number, since 2×12201531² = 297754717487922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12201531.

It is not an unprimeable number, because it can be changed into a prime (12201131) 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, 18685 + ... + 19326.

It is an arithmetic number, because the mean of its divisors is an integer number (2052648).

Almost surely, 2^12201531 is an apocalyptic number.

12201531 is a deficient number, since it is larger than the sum of its proper divisors (4219653).

12201531 is a wasteful number, since it uses less digits than its factorization.

12201531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38121.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 12201531 is about 3493.0689944517. The cubic root of 12201531 is about 230.2173811222.

Adding to 12201531 its reverse (13510221), we get a palindrome (25711752).

The spelling of 12201531 in words is "twelve million, two hundred one thousand, five hundred thirty-one".