3551243440 has 80 divisors (see below), whose sum is σ = 8538024960. Its totient is φ = 1372250880.

The previous prime is 3551243417. The next prime is 3551243467. The reversal of 3551243440 is 443421553.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×3551243440² = 25222659940286067200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2129487 + ... + 2131153.

It is an arithmetic number, because the mean of its divisors is an integer number (106725312).

Almost surely, 2^3551243440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3551243440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4269012480).

3551243440 is an abundant number, since it is smaller than the sum of its proper divisors (4986781520).

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

3551243440 is a wasteful number, since it uses less digits than its factorization.

3551243440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570 (or 2564 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 3551243440 is about 59592.3102421781. The cubic root of 3551243440 is about 1525.6683896221.

Adding to 3551243440 its reverse (443421553), we get a palindrome (3994664993).

The spelling of 3551243440 in words is "three billion, five hundred fifty-one million, two hundred forty-three thousand, four hundred forty".