45815581 has 8 divisors (see below), whose sum is σ = 52850880. Its totient is φ = 38902848.

The previous prime is 45815579. The next prime is 45815591. The reversal of 45815581 is 18551854.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45815581 - 2¹ = 45815579 is a prime.

It is a super-2 number, since 2×45815581² = 4198134924735122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45815581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45815521) 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, 29836 + ... + 31333.

It is an arithmetic number, because the mean of its divisors is an integer number (6606360).

Almost surely, 2^45815581 is an apocalyptic number.

It is an amenable number.

45815581 is a deficient number, since it is larger than the sum of its proper divisors (7035299).

45815581 is a wasteful number, since it uses less digits than its factorization.

45815581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61283.

The product of its digits is 32000, while the sum is 37.

The square root of 45815581 is about 6768.7207801770. The cubic root of 45815581 is about 357.8253181694.

The spelling of 45815581 in words is "forty-five million, eight hundred fifteen thousand, five hundred eighty-one".