55722012 has 24 divisors (see below), whose sum is σ = 131045376. Its totient is φ = 18427248.

The previous prime is 55721959. The next prime is 55722047. The reversal of 55722012 is 21022755.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16758 + ... + 19805.

It is an arithmetic number, because the mean of its divisors is an integer number (5460224).

Almost surely, 2^55722012 is an apocalyptic number.

It is an amenable number.

55722012 is an abundant number, since it is smaller than the sum of its proper divisors (75323364).

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

55722012 is a wasteful number, since it uses less digits than its factorization.

55722012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36697 (or 36695 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 55722012 is about 7464.7178111433. The cubic root of 55722012 is about 381.9521243327.

Adding to 55722012 its reverse (21022755), we get a palindrome (76744767).

The spelling of 55722012 in words is "fifty-five million, seven hundred twenty-two thousand, twelve".