55645123 has 4 divisors (see below), whose sum is σ = 55672840. Its totient is φ = 55617408.

The previous prime is 55645111. The next prime is 55645127. The reversal of 55645123 is 32154655.

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

It is a cyclic number.

It is not a de Polignac number, because 55645123 - 2²¹ = 53547971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55645127) 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, 10590 + ... + 14947.

It is an arithmetic number, because the mean of its divisors is an integer number (13918210).

Almost surely, 2^55645123 is an apocalyptic number.

55645123 is a deficient number, since it is larger than the sum of its proper divisors (27717).

55645123 is a wasteful number, since it uses less digits than its factorization.

55645123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27716.

The product of its digits is 18000, while the sum is 31.

The square root of 55645123 is about 7459.5658720867. The cubic root of 55645123 is about 381.7763623424.

Adding to 55645123 its reverse (32154655), we get a palindrome (87799778).

The spelling of 55645123 in words is "fifty-five million, six hundred forty-five thousand, one hundred twenty-three".