55541381 has 4 divisors (see below), whose sum is σ = 63475872. Its totient is φ = 47606892.

The previous prime is 55541333. The next prime is 55541401. The reversal of 55541381 is 18314555.

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-55541381 is a prime.

It is a super-2 number, since 2×55541381² = 6169690006774322, 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 (55541281) 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, 3967235 + ... + 3967248.

It is an arithmetic number, because the mean of its divisors is an integer number (15868968).

Almost surely, 2^55541381 is an apocalyptic number.

It is an amenable number.

55541381 is a deficient number, since it is larger than the sum of its proper divisors (7934491).

55541381 is an equidigital number, since it uses as much as digits as its factorization.

55541381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7934490.

The product of its digits is 12000, while the sum is 32.

The square root of 55541381 is about 7452.6090062474. The cubic root of 55541381 is about 381.5389597929.

The spelling of 55541381 in words is "fifty-five million, five hundred forty-one thousand, three hundred eighty-one".