55247660 has 48 divisors (see below), whose sum is σ = 128343936. Its totient is φ = 19844352.

The previous prime is 55247657. The next prime is 55247663. The reversal of 55247660 is 6674255.

It is an interprime number because it is at equal distance from previous prime (55247657) and next prime (55247663).

It is a self number, because there is not a number n which added to its sum of digits gives 55247660.

It is not an unprimeable number, because it can be changed into a prime (55247663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6749 + ... + 12491.

It is an arithmetic number, because the mean of its divisors is an integer number (2673832).

Almost surely, 2^55247660 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 55247660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64171968).

55247660 is an abundant number, since it is smaller than the sum of its proper divisors (73096276).

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

55247660 is a wasteful number, since it uses less digits than its factorization.

55247660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5802 (or 5800 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 55247660 is about 7432.8769665588. The cubic root of 55247660 is about 380.8652030823.

The spelling of 55247660 in words is "fifty-five million, two hundred forty-seven thousand, six hundred sixty".