55121433443 has 16 divisors (see below), whose sum is σ = 56566752000. Its totient is φ = 53683832160.

The previous prime is 55121433413. The next prime is 55121433457. The reversal of 55121433443 is 34433412155.

It is a cyclic number.

It is not a de Polignac number, because 55121433443 - 2⁶ = 55121433379 is a prime.

It is a super-2 number, since 2×55121433443² (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 (55121433413) 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, 32442608 + ... + 32444306.

It is an arithmetic number, because the mean of its divisors is an integer number (3535422000).

Almost surely, 2^55121433443 is an apocalyptic number.

55121433443 is a deficient number, since it is larger than the sum of its proper divisors (1445318557).

55121433443 is a wasteful number, since it uses less digits than its factorization.

55121433443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482.

The product of its digits is 86400, while the sum is 35.

Adding to 55121433443 its reverse (34433412155), we get a palindrome (89554845598).

The spelling of 55121433443 in words is "fifty-five billion, one hundred twenty-one million, four hundred thirty-three thousand, four hundred forty-three".