55405134 has 40 divisors (see below), whose sum is σ = 125923248. Its totient is φ = 18204480.

The previous prime is 55405127. The next prime is 55405157. The reversal of 55405134 is 43150455.

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

It is a junction number, because it is equal to n+sod(n) for n = 55405098 and 55405107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9094 + ... + 13910.

Almost surely, 2^55405134 is an apocalyptic number.

55405134 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55405134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62961624).

55405134 is an abundant number, since it is smaller than the sum of its proper divisors (70518114).

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

55405134 is a wasteful number, since it uses less digits than its factorization.

55405134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902 (or 4893 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 55405134 is about 7443.4625007452. The cubic root of 55405134 is about 381.2267235095.

Adding to 55405134 its reverse (43150455), we get a palindrome (98555589).

The spelling of 55405134 in words is "fifty-five million, four hundred five thousand, one hundred thirty-four".