55135912 has 32 divisors (see below), whose sum is σ = 112026600. Its totient is φ = 25439232.

The previous prime is 55135909. The next prime is 55135919. The reversal of 55135912 is 21953155.

It can be written as a sum of positive squares in 4 ways, for example, as 16273156 + 38862756 = 4034^2 + 6234^2 .

It is not an unprimeable number, because it can be changed into a prime (55135919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16008 + ... + 19144.

Almost surely, 2^55135912 is an apocalyptic number.

55135912 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55135912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56013300).

55135912 is an abundant number, since it is smaller than the sum of its proper divisors (56890688).

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

55135912 is a wasteful number, since it uses less digits than its factorization.

55135912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182 (or 3152 counting only the distinct ones).

The product of its digits is 6750, while the sum is 31.

The square root of 55135912 is about 7425.3560184007. The cubic root of 55135912 is about 380.6082410522.

It can be divided in two parts, 551 and 35912, that added together give a palindrome (36463).

The spelling of 55135912 in words is "fifty-five million, one hundred thirty-five thousand, nine hundred twelve".