45442815 has 32 divisors (see below), whose sum is σ = 79785216. Its totient is φ = 21903360.

The previous prime is 45442811. The next prime is 45442847. The reversal of 45442815 is 51824454.

It is a happy number.

It is not a de Polignac number, because 45442815 - 2² = 45442811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45442811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31132 + ... + 32558.

It is an arithmetic number, because the mean of its divisors is an integer number (2493288).

Almost surely, 2^45442815 is an apocalyptic number.

45442815 is a deficient number, since it is larger than the sum of its proper divisors (34342401).

45442815 is a wasteful number, since it uses less digits than its factorization.

45442815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639.

The product of its digits is 25600, while the sum is 33.

The square root of 45442815 is about 6741.1286147054. The cubic root of 45442815 is about 356.8522248514.

The spelling of 45442815 in words is "forty-five million, four hundred forty-two thousand, eight hundred fifteen".