21443141031 has 32 divisors (see below), whose sum is σ = 30905952000. Its totient is φ = 13146271488.

The previous prime is 21443141023. The next prime is 21443141089. The reversal of 21443141031 is 13014134412.

It is not a de Polignac number, because 21443141031 - 2³ = 21443141023 is a prime.

It is a super-2 number, since 2×21443141031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21443140992 and 21443141010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443140031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18992475 + ... + 18993603.

It is an arithmetic number, because the mean of its divisors is an integer number (965811000).

Almost surely, 2^21443141031 is an apocalyptic number.

21443141031 is a deficient number, since it is larger than the sum of its proper divisors (9462810969).

21443141031 is a wasteful number, since it uses less digits than its factorization.

21443141031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21443141031 its reverse (13014134412), we get a palindrome (34457275443).

The spelling of 21443141031 in words is "twenty-one billion, four hundred forty-three million, one hundred forty-one thousand, thirty-one".