55213843320 has 256 divisors, whose sum is σ = 191448576000. Its totient is φ = 14138841600.

The previous prime is 55213843303. The next prime is 55213843331. The reversal of 55213843320 is 2334831255.

55213843320 is a `hidden beast` number, since 5 + 5 + 213 + 8 + 433 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4379586 + ... + 4392174.

It is an arithmetic number, because the mean of its divisors is an integer number (747846000).

Almost surely, 2^55213843320 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 55213843320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95724288000).

55213843320 is an abundant number, since it is smaller than the sum of its proper divisors (136234732680).

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

55213843320 is a wasteful number, since it uses less digits than its factorization.

55213843320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12771 (or 12761 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 55213843320 in words is "fifty-five billion, two hundred thirteen million, eight hundred forty-three thousand, three hundred twenty".