55123045 has 4 divisors (see below), whose sum is σ = 66147660. Its totient is φ = 44098432.

The previous prime is 55123037. The next prime is 55123049. The reversal of 55123045 is 54032155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54032155 = 5 ⋅10806431.

It can be written as a sum of positive squares in 2 ways, for example, as 43467649 + 11655396 = 6593^2 + 3414^2 .

It is a cyclic number.

It is not a de Polignac number, because 55123045 - 2³ = 55123037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55123049) 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, 5512300 + ... + 5512309.

It is an arithmetic number, because the mean of its divisors is an integer number (16536915).

Almost surely, 2^55123045 is an apocalyptic number.

It is an amenable number.

55123045 is a deficient number, since it is larger than the sum of its proper divisors (11024615).

55123045 is a wasteful number, since it uses less digits than its factorization.

55123045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11024614.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55123045 is about 7424.4895447431. The cubic root of 55123045 is about 380.5786313896.

The spelling of 55123045 in words is "fifty-five million, one hundred twenty-three thousand, forty-five".