55212024 has 128 divisors (see below), whose sum is σ = 169920000. Its totient is φ = 14902272.

The previous prime is 55212011. The next prime is 55212071. The reversal of 55212024 is 42021255.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156232 + ... + 156584.

It is an arithmetic number, because the mean of its divisors is an integer number (1327500).

Almost surely, 2^55212024 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 55212024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84960000).

55212024 is an abundant number, since it is smaller than the sum of its proper divisors (114707976).

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

55212024 is a wasteful number, since it uses less digits than its factorization.

55212024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 55212024 is about 7430.4793923407. The cubic root of 55212024 is about 380.7832965568.

Adding to 55212024 its reverse (42021255), we get a palindrome (97233279).

The spelling of 55212024 in words is "fifty-five million, two hundred twelve thousand, twenty-four".