45687481 has 4 divisors (see below), whose sum is σ = 52214272. Its totient is φ = 39160692.

The previous prime is 45687461. The next prime is 45687487. The reversal of 45687481 is 18478654.

45687481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18478654 = 2 ⋅9239327.

It is a cyclic number.

It is not a de Polignac number, because 45687481 - 2⁹ = 45686969 is a prime.

It is a super-2 number, since 2×45687481² = 4174691840250722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45687487) 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 3 ways as a sum of consecutive naturals, for example, 3263385 + ... + 3263398.

It is an arithmetic number, because the mean of its divisors is an integer number (13053568).

Almost surely, 2^45687481 is an apocalyptic number.

It is an amenable number.

45687481 is a deficient number, since it is larger than the sum of its proper divisors (6526791).

45687481 is an equidigital number, since it uses as much as digits as its factorization.

45687481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6526790.

The product of its digits is 215040, while the sum is 43.

The square root of 45687481 is about 6759.2515118170. The cubic root of 45687481 is about 357.4915146241.

The spelling of 45687481 in words is "forty-five million, six hundred eighty-seven thousand, four hundred eighty-one".