43454545331 has 4 divisors (see below), whose sum is σ = 43455368664. Its totient is φ = 43453722000.

The previous prime is 43454545307. The next prime is 43454545373. The reversal of 43454545331 is 13354545434.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43454545331 is a prime.

It is a super-2 number, since 2×43454545331² (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 (43454545231) 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, 326645 + ... + 440006.

It is an arithmetic number, because the mean of its divisors is an integer number (10863842166).

Almost surely, 2^43454545331 is an apocalyptic number.

43454545331 is a deficient number, since it is larger than the sum of its proper divisors (823333).

43454545331 is an equidigital number, since it uses as much as digits as its factorization.

43454545331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823332.

The product of its digits is 864000, while the sum is 41.

The spelling of 43454545331 in words is "forty-three billion, four hundred fifty-four million, five hundred forty-five thousand, three hundred thirty-one".