55343340 has 144 divisors (see below), whose sum is σ = 184006368. Its totient is φ = 13381632.

The previous prime is 55343311. The next prime is 55343369. The reversal of 55343340 is 4334355.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55343311) and next prime (55343369).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156604 + ... + 156956.

It is an arithmetic number, because the mean of its divisors is an integer number (1277822).

Almost surely, 2^55343340 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 55343340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92003184).

55343340 is an abundant number, since it is smaller than the sum of its proper divisors (128663028).

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

55343340 is a wasteful number, since it uses less digits than its factorization.

55343340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 27.

The square root of 55343340 is about 7439.3104519169. The cubic root of 55343340 is about 381.0849418978.

Adding to 55343340 its reverse (4334355), we get a palindrome (59677695).

The spelling of 55343340 in words is "fifty-five million, three hundred forty-three thousand, three hundred forty".