55212256 has 48 divisors (see below), whose sum is σ = 119832048. Its totient is φ = 24832000.

The previous prime is 55212253. The next prime is 55212257. The reversal of 55212256 is 65221255.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55212253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34776 + ... + 36328.

It is an arithmetic number, because the mean of its divisors is an integer number (2496501).

Almost surely, 2^55212256 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 55212256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59916024).

55212256 is an abundant number, since it is smaller than the sum of its proper divisors (64619792).

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

55212256 is a wasteful number, since it uses less digits than its factorization.

55212256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675 (or 1667 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 55212256 is about 7430.4950036993. The cubic root of 55212256 is about 380.7838299044.

It can be divided in two parts, 5521 and 2256, that added together give a palindrome (7777).

The spelling of 55212256 in words is "fifty-five million, two hundred twelve thousand, two hundred fifty-six".