43121622731 has 16 divisors (see below), whose sum is σ = 51155128800. Its totient is φ = 35898324480.

The previous prime is 43121622727. The next prime is 43121622737. The reversal of 43121622731 is 13722612134.

It is a cyclic number.

It is not a de Polignac number, because 43121622731 - 2² = 43121622727 is a prime.

It is a super-2 number, since 2×43121622731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43121622737) 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, 3109256 + ... + 3123093.

It is an arithmetic number, because the mean of its divisors is an integer number (3197195550).

Almost surely, 2^43121622731 is an apocalyptic number.

43121622731 is a deficient number, since it is larger than the sum of its proper divisors (8033506069).

43121622731 is a wasteful number, since it uses less digits than its factorization.

43121622731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232414.

The product of its digits is 12096, while the sum is 32.

The spelling of 43121622731 in words is "forty-three billion, one hundred twenty-one million, six hundred twenty-two thousand, seven hundred thirty-one".