55136312 has 96 divisors (see below), whose sum is σ = 132787200. Its totient is φ = 21003840.

The previous prime is 55136303. The next prime is 55136329. The reversal of 55136312 is 21363155.

It is a super-2 number, since 2×55136312² = 6080025801922688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 535253 + ... + 535355.

It is an arithmetic number, because the mean of its divisors is an integer number (1383200).

Almost surely, 2^55136312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55136312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66393600).

55136312 is an abundant number, since it is smaller than the sum of its proper divisors (77650888).

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

55136312 is a wasteful number, since it uses less digits than its factorization.

55136312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 202 counting only the distinct ones).

The product of its digits is 2700, while the sum is 26.

The square root of 55136312 is about 7425.3829530873. The cubic root of 55136312 is about 380.6091614621.

Adding to 55136312 its reverse (21363155), we get a palindrome (76499467).

It can be divided in two parts, 551 and 36312, that added together give a palindrome (36863).

The spelling of 55136312 in words is "fifty-five million, one hundred thirty-six thousand, three hundred twelve".