55134340 has 48 divisors (see below), whose sum is σ = 120403584. Its totient is φ = 21190400.

The previous prime is 55134319. The next prime is 55134347. The reversal of 55134340 is 4343155.

It is not an unprimeable number, because it can be changed into a prime (55134347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57747 + ... + 58693.

It is an arithmetic number, because the mean of its divisors is an integer number (2508408).

Almost surely, 2^55134340 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 55134340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60201792).

55134340 is an abundant number, since it is smaller than the sum of its proper divisors (65269244).

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

55134340 is a wasteful number, since it uses less digits than its factorization.

55134340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 55134340 is about 7425.2501641359. The cubic root of 55134340 is about 380.6046237979.

Adding to 55134340 its reverse (4343155), we get a palindrome (59477495).

The spelling of 55134340 in words is "fifty-five million, one hundred thirty-four thousand, three hundred forty".