55181412 has 144 divisors (see below), whose sum is σ = 170369472. Its totient is φ = 15396480.

The previous prime is 55181411. The next prime is 55181417. The reversal of 55181412 is 21418155.

55181412 is a `hidden beast` number, since 5 + 518 + 141 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55181411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138798 + ... + 139194.

Almost surely, 2^55181412 is an apocalyptic number.

55181412 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 55181412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85184736).

55181412 is an abundant number, since it is smaller than the sum of its proper divisors (115188060).

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

55181412 is a wasteful number, since it uses less digits than its factorization.

55181412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 426 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 55181412 is about 7428.4192127262. The cubic root of 55181412 is about 380.7129091521.

Adding to 55181412 its reverse (21418155), we get a palindrome (76599567).

The spelling of 55181412 in words is "fifty-five million, one hundred eighty-one thousand, four hundred twelve".