55475712 has 80 divisors (see below), whose sum is σ = 164252880. Its totient is φ = 18487296.

The previous prime is 55475681. The next prime is 55475723. The reversal of 55475712 is 21757455.

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 7 ways as a sum of consecutive naturals, for example, 11818 + ... + 15830.

It is an arithmetic number, because the mean of its divisors is an integer number (2053161).

Almost surely, 2^55475712 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 55475712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82126440).

55475712 is an abundant number, since it is smaller than the sum of its proper divisors (108777168).

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

55475712 is an equidigital number, since it uses as much as digits as its factorization.

55475712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040 (or 4018 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 55475712 is about 7448.2019306676. The cubic root of 55475712 is about 381.3885304335.

The spelling of 55475712 in words is "fifty-five million, four hundred seventy-five thousand, seven hundred twelve".