45448781 has 4 divisors (see below), whose sum is σ = 51941472. Its totient is φ = 38956092.

The previous prime is 45448757. The next prime is 45448789. The reversal of 45448781 is 18784454.

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.

It is not a de Polignac number, because 45448781 - 2⁶ = 45448717 is a prime.

It is a super-2 number, since 2×45448781² = 4131183388771922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45448789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3246335 + ... + 3246348.

It is an arithmetic number, because the mean of its divisors is an integer number (12985368).

Almost surely, 2^45448781 is an apocalyptic number.

It is an amenable number.

45448781 is a deficient number, since it is larger than the sum of its proper divisors (6492691).

45448781 is an equidigital number, since it uses as much as digits as its factorization.

45448781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492690.

The product of its digits is 143360, while the sum is 41.

The square root of 45448781 is about 6741.5711076870. The cubic root of 45448781 is about 356.8678407210.

The spelling of 45448781 in words is "forty-five million, four hundred forty-eight thousand, seven hundred eighty-one".