1006225813 has 4 divisors (see below), whose sum is σ = 1030767948. Its totient is φ = 981683680.

The previous prime is 1006225811. The next prime is 1006225817. The reversal of 1006225813 is 3185226001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3185226001 = 23 ⋅138488087.

It can be written as a sum of positive squares in 2 ways, for example, as 16305444 + 989920369 = 4038^2 + 31463^2 .

It is a cyclic number.

It is not a de Polignac number, because 1006225813 - 2¹ = 1006225811 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 (1006225811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12271006 + ... + 12271087.

It is an arithmetic number, because the mean of its divisors is an integer number (257691987).

Almost surely, 2^1006225813 is an apocalyptic number.

It is an amenable number.

1006225813 is a deficient number, since it is larger than the sum of its proper divisors (24542135).

1006225813 is an equidigital number, since it uses as much as digits as its factorization.

1006225813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24542134.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1006225813 is about 31721.0626083049. The cubic root of 1006225813 is about 1002.0709790849.

The spelling of 1006225813 in words is "one billion, six million, two hundred twenty-five thousand, eight hundred thirteen".