1023205213 has 8 divisors (see below), whose sum is σ = 1030033368. Its totient is φ = 1016387904.

The previous prime is 1023205153. The next prime is 1023205217. The reversal of 1023205213 is 3125023201.

It can be written as a sum of positive squares in 4 ways, for example, as 2913849 + 1020291364 = 1707^2 + 31942^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1023205213 - 2¹⁷ = 1023074141 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 (1023205217) 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, 281395 + ... + 285007.

It is an arithmetic number, because the mean of its divisors is an integer number (128754171).

Almost surely, 2^1023205213 is an apocalyptic number.

It is an amenable number.

1023205213 is a deficient number, since it is larger than the sum of its proper divisors (6828155).

1023205213 is a wasteful number, since it uses less digits than its factorization.

1023205213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1023205213 is about 31987.5790424971. The cubic root of 1023205213 is about 1007.6759992760.

Adding to 1023205213 its reverse (3125023201), we get a palindrome (4148228414).

The spelling of 1023205213 in words is "one billion, twenty-three million, two hundred five thousand, two hundred thirteen".