45000055 has 4 divisors (see below), whose sum is σ = 54000072. Its totient is φ = 36000040.

The previous prime is 45000031. The next prime is 45000061. The reversal of 45000055 is 55000054.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55000054 = 2 ⋅27500027.

It is not a de Polignac number, because 45000055 - 2⁵ = 45000023 is a prime.

It is a Duffinian number.

45000055 is a modest number, since divided by 55 gives 45 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 44999996 and 45000041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4500001 + ... + 4500010.

It is an arithmetic number, because the mean of its divisors is an integer number (13500018).

Almost surely, 2^45000055 is an apocalyptic number.

45000055 is a deficient number, since it is larger than the sum of its proper divisors (9000017).

45000055 is an equidigital number, since it uses as much as digits as its factorization.

45000055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9000016.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 45000055 is about 6708.2080319561. The cubic root of 45000055 is about 355.6894753594.

Subtracting 45000055 from its reverse (55000054), we obtain a palindrome (9999999).

The spelling of 45000055 in words is "forty-five million, fifty-five", and thus it is an aban number and an uban number.