55521205429 has 4 divisors (see below), whose sum is σ = 55529190720. Its totient is φ = 55513220140.

The previous prime is 55521205427. The next prime is 55521205457. The reversal of 55521205429 is 92450212555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55521205429 - 2¹ = 55521205427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55521205391 and 55521205400.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3982207 + ... + 3996124.

It is an arithmetic number, because the mean of its divisors is an integer number (13882297680).

Almost surely, 2^55521205429 is an apocalyptic number.

It is an amenable number.

55521205429 is a deficient number, since it is larger than the sum of its proper divisors (7985291).

55521205429 is an equidigital number, since it uses as much as digits as its factorization.

55521205429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7985290.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 55521205429 in words is "fifty-five billion, five hundred twenty-one million, two hundred five thousand, four hundred twenty-nine".