581225949 has 10 divisors (see below), whose sum is σ = 868251230. Its totient is φ = 387483912.

The previous prime is 581225947. The next prime is 581225959. The reversal of 581225949 is 949522185.

It is a happy number.

581225949 is a `hidden beast` number, since 58 + 1 + 2 + 2 + 594 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 422919225 + 158306724 = 20565^2 + 12582^2 .

It is not a de Polignac number, because 581225949 - 2¹ = 581225947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581225947) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3587734 + ... + 3587895.

It is an arithmetic number, because the mean of its divisors is an integer number (86825123).

Almost surely, 2^581225949 is an apocalyptic number.

It is an amenable number.

581225949 is a deficient number, since it is larger than the sum of its proper divisors (287025281).

581225949 is an equidigital number, since it uses as much as digits as its factorization.

581225949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7175641 (or 7175632 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 581225949 is about 24108.6281028183. The cubic root of 581225949 is about 834.5422564334.

The spelling of 581225949 in words is "five hundred eighty-one million, two hundred twenty-five thousand, nine hundred forty-nine".