45440155 has 4 divisors (see below), whose sum is σ = 54528192. Its totient is φ = 36352120.

The previous prime is 45440119. The next prime is 45440159. The reversal of 45440155 is 55104454.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55104454 = 2 ⋅27552227.

It is not a de Polignac number, because 45440155 - 2⁹ = 45439643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45440159) 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, 4544011 + ... + 4544020.

It is an arithmetic number, because the mean of its divisors is an integer number (13632048).

Almost surely, 2^45440155 is an apocalyptic number.

45440155 is a deficient number, since it is larger than the sum of its proper divisors (9088037).

45440155 is an equidigital number, since it uses as much as digits as its factorization.

45440155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088036.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 45440155 is about 6740.9313154786. The cubic root of 45440155 is about 356.8452619213.

The spelling of 45440155 in words is "forty-five million, four hundred forty thousand, one hundred fifty-five".