55222012 has 6 divisors (see below), whose sum is σ = 96638528. Its totient is φ = 27611004.

The previous prime is 55222009. The next prime is 55222043. The reversal of 55222012 is 21022255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6902748 + ... + 6902755.

Almost surely, 2^55222012 is an apocalyptic number.

It is an amenable number.

55222012 is a deficient number, since it is larger than the sum of its proper divisors (41416516).

55222012 is a wasteful number, since it uses less digits than its factorization.

55222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13805507 (or 13805505 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 55222012 is about 7431.1514585561. The cubic root of 55222012 is about 380.8062567382.

Adding to 55222012 its reverse (21022255), we get a palindrome (76244267).

The spelling of 55222012 in words is "fifty-five million, two hundred twenty-two thousand, twelve".