45449281 has 8 divisors (see below), whose sum is σ = 45909864. Its totient is φ = 44991360.

The previous prime is 45449269. The next prime is 45449291. The reversal of 45449281 is 18294454.

45449281 = T₅₅₀₃ + T₅₅₀₄ + T₅₅₀₅.

It can be written as a sum of positive squares in 4 ways, for example, as 13808656 + 31640625 = 3716^2 + 5625^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45449281 is a prime.

It is a super-2 number, since 2×45449281² = 4131274286833922, 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 45449281.

It is not an unprimeable number, because it can be changed into a prime (45449291) 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, 52605 + ... + 53461.

It is an arithmetic number, because the mean of its divisors is an integer number (5738733).

Almost surely, 2^45449281 is an apocalyptic number.

45449281 is the 5505-th centered triangular number.

It is an amenable number.

45449281 is a deficient number, since it is larger than the sum of its proper divisors (460583).

45449281 is a wasteful number, since it uses less digits than its factorization.

45449281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its digits is 46080, while the sum is 37.

The square root of 45449281 is about 6741.6081909289. The cubic root of 45449281 is about 356.8691493976.

The spelling of 45449281 in words is "forty-five million, four hundred forty-nine thousand, two hundred eighty-one".