21160543131 has 36 divisors (see below), whose sum is σ = 38290516992. Its totient is φ = 11161602144.

The previous prime is 21160543111. The next prime is 21160543139. The reversal of 21160543131 is 13134506112.

It is a happy number.

21160543131 is a `hidden beast` number, since 2 + 1 + 1 + 605 + 43 + 13 + 1 = 666.

It is not a de Polignac number, because 21160543131 - 2¹⁷ = 21160412059 is a prime.

It is a super-2 number, since 2×21160543131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21160543095 and 21160543104.

It is not an unprimeable number, because it can be changed into a prime (21160543139) 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 35 ways as a sum of consecutive naturals, for example, 1839771 + ... + 1851236.

It is an arithmetic number, because the mean of its divisors is an integer number (1063625472).

Almost surely, 2^21160543131 is an apocalyptic number.

21160543131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21160543131 is a deficient number, since it is larger than the sum of its proper divisors (17129973861).

21160543131 is a wasteful number, since it uses less digits than its factorization.

21160543131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691040 (or 3691030 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 21160543131 in words is "twenty-one billion, one hundred sixty million, five hundred forty-three thousand, one hundred thirty-one".