45637281 has 6 divisors (see below), whose sum is σ = 65920530. Its totient is φ = 30424848.

The previous prime is 45637253. The next prime is 45637321. The reversal of 45637281 is 18273654.

45637281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 15563025 = 5484^2 + 3945^2 .

It is not a de Polignac number, because 45637281 - 2¹⁵ = 45604513 is a prime.

It is a super-2 number, since 2×45637281² = 4165522834145922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45637201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2535396 + ... + 2535413.

It is an arithmetic number, because the mean of its divisors is an integer number (10986755).

Almost surely, 2^45637281 is an apocalyptic number.

It is an amenable number.

45637281 is a deficient number, since it is larger than the sum of its proper divisors (20283249).

45637281 is a wasteful number, since it uses less digits than its factorization.

45637281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070815 (or 5070812 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 45637281 is about 6755.5370622919. The cubic root of 45637281 is about 357.3605330764.

The spelling of 45637281 in words is "forty-five million, six hundred thirty-seven thousand, two hundred eighty-one".