45131668 has 24 divisors (see below), whose sum is σ = 84407400. Its totient is φ = 21040128.

The previous prime is 45131663. The next prime is 45131687. The reversal of 45131668 is 86613154.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10227204 + 34904464 = 3198^2 + 5908^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45131663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4368 + ... + 10456.

It is an arithmetic number, because the mean of its divisors is an integer number (3516975).

Almost surely, 2^45131668 is an apocalyptic number.

It is an amenable number.

45131668 is a deficient number, since it is larger than the sum of its proper divisors (39275732).

45131668 is a wasteful number, since it uses less digits than its factorization.

45131668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6219 (or 6217 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 45131668 is about 6718.0107174669. The cubic root of 45131668 is about 356.0359030406.

The spelling of 45131668 in words is "forty-five million, one hundred thirty-one thousand, six hundred sixty-eight".