55621224320 has 32 divisors (see below), whose sum is σ = 132969490920. Its totient is φ = 22248489472.

The previous prime is 55621224319. The next prime is 55621224343. The reversal of 55621224320 is 2342212655.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 43453442 + ... + 43454721.

Almost surely, 2^55621224320 is an apocalyptic number.

It is an amenable number.

55621224320 is an abundant number, since it is smaller than the sum of its proper divisors (77348266600).

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

55621224320 is an equidigital number, since it uses as much as digits as its factorization.

55621224320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86908182 (or 86908170 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 55621224320 its reverse (2342212655), we get a palindrome (57963436975).

The spelling of 55621224320 in words is "fifty-five billion, six hundred twenty-one million, two hundred twenty-four thousand, three hundred twenty".