55732212 has 60 divisors (see below), whose sum is σ = 149664900. Its totient is φ = 18071424.

The previous prime is 55732211. The next prime is 55732213. The reversal of 55732212 is 21223755.

It is an interprime number because it is at equal distance from previous prime (55732211) and next prime (55732213).

It can be written as a sum of positive squares in 2 ways, for example, as 52620516 + 3111696 = 7254^2 + 1764^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55732211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9664 + ... + 14312.

It is an arithmetic number, because the mean of its divisors is an integer number (2494415).

Almost surely, 2^55732212 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 55732212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74832450).

55732212 is an abundant number, since it is smaller than the sum of its proper divisors (93932688).

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

55732212 is a wasteful number, since it uses less digits than its factorization.

55732212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4702 (or 4691 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 55732212 is about 7465.4009939185. The cubic root of 55732212 is about 381.9754285521.

Adding to 55732212 its reverse (21223755), we get a palindrome (76955967).

The spelling of 55732212 in words is "fifty-five million, seven hundred thirty-two thousand, two hundred twelve".