55212232 has 8 divisors (see below), whose sum is σ = 103522950. Its totient is φ = 27606112.

The previous prime is 55212217. The next prime is 55212239. The reversal of 55212232 is 23221255.

It can be written as a sum of positive squares in only one way, i.e., 28026436 + 27185796 = 5294^2 + 5214^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (55212239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3450757 + ... + 3450772.

Almost surely, 2^55212232 is an apocalyptic number.

It is an amenable number.

55212232 is a deficient number, since it is larger than the sum of its proper divisors (48310718).

55212232 is a wasteful number, since it uses less digits than its factorization.

55212232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6901535 (or 6901531 counting only the distinct ones).

The product of its digits is 1200, while the sum is 22.

The square root of 55212232 is about 7430.4933887327. The cubic root of 55212232 is about 380.7837747306.

Adding to 55212232 its reverse (23221255), we get a palindrome (78433487).

The spelling of 55212232 in words is "fifty-five million, two hundred twelve thousand, two hundred thirty-two".