55521205430 has 8 divisors (see below), whose sum is σ = 99938169792. Its totient is φ = 22208482168.

The previous prime is 55521205427. The next prime is 55521205457. The reversal of 55521205430 is 3450212555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×55521205430² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2776060262 + ... + 2776060281.

It is an arithmetic number, because the mean of its divisors is an integer number (12492271224).

Almost surely, 2^55521205430 is an apocalyptic number.

55521205430 is a deficient number, since it is larger than the sum of its proper divisors (44416964362).

55521205430 is a wasteful number, since it uses less digits than its factorization.

55521205430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552120550.

The product of its (nonzero) digits is 30000, while the sum is 32.

Adding to 55521205430 its reverse (3450212555), we get a palindrome (58971417985).

The spelling of 55521205430 in words is "fifty-five billion, five hundred twenty-one million, two hundred five thousand, four hundred thirty".