2021232313 has 4 divisors (see below), whose sum is σ = 2021326708. Its totient is φ = 2021137920.

The previous prime is 2021232307. The next prime is 2021232371. The reversal of 2021232313 is 3132321202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1552596409 + 468635904 = 39403^2 + 21648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021232313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021232013) 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, 2053 + ... + 63613.

It is an arithmetic number, because the mean of its divisors is an integer number (505331677).

Almost surely, 2^2021232313 is an apocalyptic number.

It is an amenable number.

2021232313 is a deficient number, since it is larger than the sum of its proper divisors (94395).

2021232313 is an equidigital number, since it uses as much as digits as its factorization.

2021232313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94394.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 2021232313 is about 44958.1173204573. The cubic root of 2021232313 is about 1264.3638712417.

Adding to 2021232313 its reverse (3132321202), we get a palindrome (5153553515).

Subtracting 2021232313 from its reverse (3132321202), we obtain a square (1111088889 = 33333²).

It can be divided in two parts, 20212 and 32313, that added together give a palindrome (52525).

The spelling of 2021232313 in words is "two billion, twenty-one million, two hundred thirty-two thousand, three hundred thirteen".