20211041531 has 4 divisors (see below), whose sum is σ = 20211340032. Its totient is φ = 20210743032.

The previous prime is 20211041483. The next prime is 20211041533. The reversal of 20211041531 is 13514011202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211041531 is a prime.

It is a super-2 number, since 2×20211041531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211041533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6470 + ... + 201156.

It is an arithmetic number, because the mean of its divisors is an integer number (5052835008).

Almost surely, 2^20211041531 is an apocalyptic number.

20211041531 is a deficient number, since it is larger than the sum of its proper divisors (298501).

20211041531 is a wasteful number, since it uses less digits than its factorization.

20211041531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298500.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 20211041531 its reverse (13514011202), we get a palindrome (33725052733).

The spelling of 20211041531 in words is "twenty billion, two hundred eleven million, forty-one thousand, five hundred thirty-one".