55843381 has 4 divisors (see below), whose sum is σ = 60920064. Its totient is φ = 50766700.

The previous prime is 55843373. The next prime is 55843409. The reversal of 55843381 is 18334855.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55843381 - 2³ = 55843373 is a prime.

It is a super-2 number, since 2×55843381² = 6236966403022322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55843381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55843301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2538325 + ... + 2538346.

It is an arithmetic number, because the mean of its divisors is an integer number (15230016).

Almost surely, 2^55843381 is an apocalyptic number.

It is an amenable number.

55843381 is a deficient number, since it is larger than the sum of its proper divisors (5076683).

55843381 is a wasteful number, since it uses less digits than its factorization.

55843381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076682.

The product of its digits is 57600, while the sum is 37.

The square root of 55843381 is about 7472.8428994593. The cubic root of 55843381 is about 382.2292352344.

The spelling of 55843381 in words is "fifty-five million, eight hundred forty-three thousand, three hundred eighty-one".