320261213 has 4 divisors (see below), whose sum is σ = 320468988. Its totient is φ = 320053440.

The previous prime is 320261197. The next prime is 320261231. The reversal of 320261213 is 312162023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312162023 = 1511 ⋅206593.

It can be written as a sum of positive squares in 2 ways, for example, as 168922009 + 151339204 = 12997^2 + 12302^2 .

It is a cyclic number.

It is not a de Polignac number, because 320261213 - 2⁴ = 320261197 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 (320231213) 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, 101558 + ... + 104663.

It is an arithmetic number, because the mean of its divisors is an integer number (80117247).

Almost surely, 2^320261213 is an apocalyptic number.

It is an amenable number.

320261213 is a deficient number, since it is larger than the sum of its proper divisors (207775).

320261213 is a wasteful number, since it uses less digits than its factorization.

320261213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207774.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 320261213 is about 17895.8434559537. The cubic root of 320261213 is about 684.1764396978.

The spelling of 320261213 in words is "three hundred twenty million, two hundred sixty-one thousand, two hundred thirteen".