449509251 has 16 divisors (see below), whose sum is σ = 620559360. Its totient is φ = 289084320.

The previous prime is 449509241. The next prime is 449509273. The reversal of 449509251 is 152905944.

It is not a de Polignac number, because 449509251 - 2²¹ = 447412099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (449509211) 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 15 ways as a sum of consecutive naturals, for example, 185236 + ... + 187646.

It is an arithmetic number, because the mean of its divisors is an integer number (38784960).

Almost surely, 2^449509251 is an apocalyptic number.

449509251 is a deficient number, since it is larger than the sum of its proper divisors (171050109).

449509251 is a wasteful number, since it uses less digits than its factorization.

449509251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4586.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 449509251 is about 21201.6332153917. The cubic root of 449509251 is about 766.0307639661.

The spelling of 449509251 in words is "four hundred forty-nine million, five hundred nine thousand, two hundred fifty-one".