55620552 has 64 divisors (see below), whose sum is σ = 152974080. Its totient is φ = 16745472.

The previous prime is 55620529. The next prime is 55620553. The reversal of 55620552 is 25502655.

It is not an unprimeable number, because it can be changed into a prime (55620553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12768 + ... + 16560.

It is an arithmetic number, because the mean of its divisors is an integer number (2390220).

Almost surely, 2^55620552 is an apocalyptic number.

55620552 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55620552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76487040).

55620552 is an abundant number, since it is smaller than the sum of its proper divisors (97353528).

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

55620552 is a wasteful number, since it uses less digits than its factorization.

55620552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862 (or 3858 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 55620552 is about 7457.9187445292. The cubic root of 55620552 is about 381.7201609028.

The spelling of 55620552 in words is "fifty-five million, six hundred twenty thousand, five hundred fifty-two".