1005542213 has 4 divisors (see below), whose sum is σ = 1082891628. Its totient is φ = 928192800.

The previous prime is 1005542191. The next prime is 1005542227. The reversal of 1005542213 is 3122455001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 617373409 + 388168804 = 24847^2 + 19702^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005542213 - 2¹⁶ = 1005476677 is a prime.

It is a super-2 number, since 2×1005542213² = 2022230284249874738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005542243) 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, 38674688 + ... + 38674713.

It is an arithmetic number, because the mean of its divisors is an integer number (270722907).

Almost surely, 2^1005542213 is an apocalyptic number.

1005542213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1005542213 is a deficient number, since it is larger than the sum of its proper divisors (77349415).

1005542213 is an equidigital number, since it uses as much as digits as its factorization.

1005542213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77349414.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1005542213 is about 31710.2856026243. The cubic root of 1005542213 is about 1001.8440019002.

Adding to 1005542213 its reverse (3122455001), we get a palindrome (4127997214).

The spelling of 1005542213 in words is "one billion, five million, five hundred forty-two thousand, two hundred thirteen".