23212131 has 8 divisors (see below), whose sum is σ = 31669440. Its totient is φ = 15114792.

The previous prime is 23212099. The next prime is 23212139. The reversal of 23212131 is 13121232.

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

It is not a de Polignac number, because 23212131 - 2⁵ = 23212099 is a prime.

It is a super-4 number, since 4×23212131⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 23212131.

It is not an unprimeable number, because it can be changed into a prime (23212139) 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, 89841 + ... + 90098.

It is an arithmetic number, because the mean of its divisors is an integer number (3958680).

Almost surely, 2^23212131 is an apocalyptic number.

23212131 is a deficient number, since it is larger than the sum of its proper divisors (8457309).

23212131 is a wasteful number, since it uses less digits than its factorization.

23212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179985.

The product of its digits is 72, while the sum is 15.

The square root of 23212131 is about 4817.8969478394. The cubic root of 23212131 is about 285.2583314833.

Adding to 23212131 its reverse (13121232), we get a palindrome (36333363).

The spelling of 23212131 in words is "twenty-three million, two hundred twelve thousand, one hundred thirty-one".