55423212 has 36 divisors (see below), whose sum is σ = 140038920. Its totient is φ = 17052672.

The previous prime is 55423157. The next prime is 55423217. The reversal of 55423212 is 21232455.

It is not an unprimeable number, because it can be changed into a prime (55423217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11637 + ... + 15692.

It is an arithmetic number, because the mean of its divisors is an integer number (3889970).

Almost surely, 2^55423212 is an apocalyptic number.

55423212 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

55423212 is an abundant number, since it is smaller than the sum of its proper divisors (84615708).

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

55423212 is a wasteful number, since it uses less digits than its factorization.

55423212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27362 (or 27347 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 55423212 is about 7444.6767559109. The cubic root of 55423212 is about 381.2681821661.

Adding to 55423212 its reverse (21232455), we get a palindrome (76655667).

The spelling of 55423212 in words is "fifty-five million, four hundred twenty-three thousand, two hundred twelve".