55825812 has 72 divisors (see below), whose sum is σ = 166857600. Its totient is φ = 15398208.

The previous prime is 55825811. The next prime is 55825813. The reversal of 55825812 is 21852855.

55825812 is a `hidden beast` number, since 558 + 25 + 81 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (55825811) and next prime (55825813).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55825811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3489 + ... + 11127.

Almost surely, 2^55825812 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 55825812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83428800).

55825812 is an abundant number, since it is smaller than the sum of its proper divisors (111031788).

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

55825812 is a wasteful number, since it uses less digits than its factorization.

55825812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7685 (or 7680 counting only the distinct ones).

The product of its digits is 32000, while the sum is 36.

The square root of 55825812 is about 7471.6672838129. The cubic root of 55825812 is about 382.1891463902.

The spelling of 55825812 in words is "fifty-five million, eight hundred twenty-five thousand, eight hundred twelve".