55381793 has 4 divisors (see below), whose sum is σ = 57291540. Its totient is φ = 53472048.

The previous prime is 55381771. The next prime is 55381819. The reversal of 55381793 is 39718355.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19465744 + 35916049 = 4412^2 + 5993^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55381793 is a prime.

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 55381793.

It is not an unprimeable number, because it can be changed into a prime (55381093) 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, 954830 + ... + 954887.

It is an arithmetic number, because the mean of its divisors is an integer number (14322885).

Almost surely, 2^55381793 is an apocalyptic number.

It is an amenable number.

55381793 is a deficient number, since it is larger than the sum of its proper divisors (1909747).

55381793 is a wasteful number, since it uses less digits than its factorization.

55381793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909746.

The product of its digits is 113400, while the sum is 41.

The square root of 55381793 is about 7441.8944496680. The cubic root of 55381793 is about 381.1731817638.

The spelling of 55381793 in words is "fifty-five million, three hundred eighty-one thousand, seven hundred ninety-three".