20231201531 has 8 divisors (see below), whose sum is σ = 21215527680. Its totient is φ = 19265988672.

The previous prime is 20231201513. The next prime is 20231201567. The reversal of 20231201531 is 13510213202.

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

It is a cyclic number.

It is not a de Polignac number, because 20231201531 - 2⁶ = 20231201467 is a prime.

It is a super-2 number, since 2×20231201531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20231201131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4776155 + ... + 4780388.

It is an arithmetic number, because the mean of its divisors is an integer number (2651940960).

Almost surely, 2^20231201531 is an apocalyptic number.

20231201531 is a deficient number, since it is larger than the sum of its proper divisors (984326149).

20231201531 is an equidigital number, since it uses as much as digits as its factorization.

20231201531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9556645.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 20231201531 its reverse (13510213202), we get a palindrome (33741414733).

The spelling of 20231201531 in words is "twenty billion, two hundred thirty-one million, two hundred one thousand, five hundred thirty-one".