1005531213 has 8 divisors (see below), whose sum is σ = 1353008800. Its totient is φ = 664203888.

The previous prime is 1005531193. The next prime is 1005531223. The reversal of 1005531213 is 3121355001.

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

It is not a de Polignac number, because 1005531213 - 2²⁶ = 938422349 is a prime.

It is a super-2 number, since 2×1005531213² = 2022186040634502738, 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 1005531213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005531223) 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, 1537183 + ... + 1537836.

It is an arithmetic number, because the mean of its divisors is an integer number (169126100).

Almost surely, 2^1005531213 is an apocalyptic number.

It is an amenable number.

1005531213 is a deficient number, since it is larger than the sum of its proper divisors (347477587).

1005531213 is a wasteful number, since it uses less digits than its factorization.

1005531213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3075131.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1005531213 is about 31710.1121568499. The cubic root of 1005531213 is about 1001.8403487056.

Adding to 1005531213 its reverse (3121355001), we get a palindrome (4126886214).

The spelling of 1005531213 in words is "one billion, five million, five hundred thirty-one thousand, two hundred thirteen".