55322261520 has 160 divisors (see below), whose sum is σ = 174526210560. Its totient is φ = 14492805120.

The previous prime is 55322261497. The next prime is 55322261531. The reversal of 55322261520 is 2516222355.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15209142 + ... + 15212778.

It is an arithmetic number, because the mean of its divisors is an integer number (1090788816).

Almost surely, 2^55322261520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55322261520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87263105280).

55322261520 is an abundant number, since it is smaller than the sum of its proper divisors (119203949040).

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

55322261520 is a wasteful number, since it uses less digits than its factorization.

55322261520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4753 (or 4747 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 55322261520 its reverse (2516222355), we get a palindrome (57838483875).

The spelling of 55322261520 in words is "fifty-five billion, three hundred twenty-two million, two hundred sixty-one thousand, five hundred twenty".