45721563 has 8 divisors (see below), whose sum is σ = 62112528. Its totient is φ = 29905824.

The previous prime is 45721561. The next prime is 45721567. The reversal of 45721563 is 36512754.

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

It is not a de Polignac number, because 45721563 - 2¹ = 45721561 is a prime.

It is a super-2 number, since 2×45721563² = 4180922646325938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45721561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143620 + ... + 143937.

It is an arithmetic number, because the mean of its divisors is an integer number (7764066).

Almost surely, 2^45721563 is an apocalyptic number.

45721563 is a deficient number, since it is larger than the sum of its proper divisors (16390965).

45721563 is a wasteful number, since it uses less digits than its factorization.

45721563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287613.

The product of its digits is 25200, while the sum is 33.

The square root of 45721563 is about 6761.7721789484. The cubic root of 45721563 is about 357.5803865069.

The spelling of 45721563 in words is "forty-five million, seven hundred twenty-one thousand, five hundred sixty-three".