2161531405032 has 32 divisors (see below), whose sum is σ = 5416366423680. Its totient is φ = 718838746880.

The previous prime is 2161531405003. The next prime is 2161531405037. The reversal of 2161531405032 is 2305041351612.

It is a super-2 number, since 2×2161531405032² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2161531404984 and 2161531405002.

It is not an unprimeable number, because it can be changed into a prime (2161531405037) 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, 104472033 + ... + 104492720.

It is an arithmetic number, because the mean of its divisors is an integer number (169261450740).

Almost surely, 2^{2161531405032} is an apocalyptic number.

It is an amenable number.

2161531405032 is an abundant number, since it is smaller than the sum of its proper divisors (3254835018648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161531405032 is a wasteful number, since it uses less digits than its factorization.

2161531405032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208965193 (or 208965189 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 2161531405032 its reverse (2305041351612), we get a palindrome (4466572756644).

The spelling of 2161531405032 in words is "two trillion, one hundred sixty-one billion, five hundred thirty-one million, four hundred five thousand, thirty-two".