43551320442 has 24 divisors (see below), whose sum is σ = 101323480896. Its totient is φ = 12443234328.

The previous prime is 43551320437. The next prime is 43551320557. The reversal of 43551320442 is 24402315534.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74066578 + ... + 74067165.

It is an arithmetic number, because the mean of its divisors is an integer number (4221811704).

Almost surely, 2^43551320442 is an apocalyptic number.

43551320442 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

43551320442 is an abundant number, since it is smaller than the sum of its proper divisors (57772160454).

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

43551320442 is a wasteful number, since it uses less digits than its factorization.

43551320442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148133762 (or 148133755 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 43551320442 its reverse (24402315534), we get a palindrome (67953635976).

The spelling of 43551320442 in words is "forty-three billion, five hundred fifty-one million, three hundred twenty thousand, four hundred forty-two".