43957020031 has 4 divisors (see below), whose sum is σ = 44115709912. Its totient is φ = 43798330152.

The previous prime is 43957019971. The next prime is 43957020047. The reversal of 43957020031 is 13002075934.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43957020031 - 2¹⁷ = 43956888959 is a prime.

It is a super-2 number, since 2×43957020031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43957020931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79344525 + ... + 79345078.

It is an arithmetic number, because the mean of its divisors is an integer number (11028927478).

Almost surely, 2^43957020031 is an apocalyptic number.

43957020031 is a deficient number, since it is larger than the sum of its proper divisors (158689881).

43957020031 is a wasteful number, since it uses less digits than its factorization.

43957020031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158689880.

The product of its (nonzero) digits is 22680, while the sum is 34.

Adding to 43957020031 its reverse (13002075934), we get a palindrome (56959095965).

The spelling of 43957020031 in words is "forty-three billion, nine hundred fifty-seven million, twenty thousand, thirty-one".