43291621131 has 16 divisors (see below), whose sum is σ = 65707441920. Its totient is φ = 25096591520.

The previous prime is 43291621129. The next prime is 43291621187. The reversal of 43291621131 is 13112619234.

It is not a de Polignac number, because 43291621131 - 2¹ = 43291621129 is a prime.

It is a super-2 number, since 2×43291621131² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 43291621092 and 43291621101.

It is not an unprimeable number, because it can be changed into a prime (43291621111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28518096 + ... + 28519613.

It is an arithmetic number, because the mean of its divisors is an integer number (4106715120).

Almost surely, 2^43291621131 is an apocalyptic number.

43291621131 is a deficient number, since it is larger than the sum of its proper divisors (22415820789).

43291621131 is a wasteful number, since it uses less digits than its factorization.

43291621131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57037746.

The product of its digits is 7776, while the sum is 33.

The spelling of 43291621131 in words is "forty-three billion, two hundred ninety-one million, six hundred twenty-one thousand, one hundred thirty-one".