55521205433 has 12 divisors (see below), whose sum is σ = 58612692528. Its totient is φ = 52585106040.

The previous prime is 55521205427. The next prime is 55521205457. The reversal of 55521205433 is 33450212555.

It is a de Polignac number, because none of the positive numbers 2^k-55521205433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55521205393 and 55521205402.

It is not an unprimeable number, because it can be changed into a prime (55521205423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1501910 + ... + 1538432.

It is an arithmetic number, because the mean of its divisors is an integer number (4884391044).

Almost surely, 2^55521205433 is an apocalyptic number.

It is an amenable number.

55521205433 is a deficient number, since it is larger than the sum of its proper divisors (3091487095).

55521205433 is a wasteful number, since it uses less digits than its factorization.

55521205433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40772 (or 40753 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

Adding to 55521205433 its reverse (33450212555), we get a palindrome (88971417988).

The spelling of 55521205433 in words is "fifty-five billion, five hundred twenty-one million, two hundred five thousand, four hundred thirty-three".