55673381 has 4 divisors (see below), whose sum is σ = 55772832. Its totient is φ = 55573932.

The previous prime is 55673357. The next prime is 55673383. The reversal of 55673381 is 18337655.

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 a de Polignac number, because none of the positive numbers 2^k-55673381 is a prime.

It is a super-2 number, since 2×55673381² = 6199050703942322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55673383) 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, 48881 + ... + 50006.

It is an arithmetic number, because the mean of its divisors is an integer number (13943208).

Almost surely, 2^55673381 is an apocalyptic number.

It is an amenable number.

55673381 is a deficient number, since it is larger than the sum of its proper divisors (99451).

55673381 is an equidigital number, since it uses as much as digits as its factorization.

55673381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99450.

The product of its digits is 75600, while the sum is 38.

The square root of 55673381 is about 7461.4597097351. The cubic root of 55673381 is about 381.8409766351.

It can be divided in two parts, 556 and 73381, that added together give a palindrome (73937).

The spelling of 55673381 in words is "fifty-five million, six hundred seventy-three thousand, three hundred eighty-one".