2147813 has 4 divisors (see below), whose sum is σ = 2205900. Its totient is φ = 2089728.

The previous prime is 2147801. The next prime is 2147839. The reversal of 2147813 is 3187412.

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 1760929 + 386884 = 1327^2 + 622^2 .

It is a cyclic number.

It is not a de Polignac number, because 2147813 - 2¹⁰ = 2146789 is a prime.

It is a super-2 number, since 2×2147813² = 9226201365938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147843) 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, 28988 + ... + 29061.

It is an arithmetic number, because the mean of its divisors is an integer number (551475).

2^2147813 is an apocalyptic number.

It is an amenable number.

2147813 is a deficient number, since it is larger than the sum of its proper divisors (58087).

2147813 is an equidigital number, since it uses as much as digits as its factorization.

2147813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58086.

The product of its digits is 1344, while the sum is 26.

The square root of 2147813 is about 1465.5418793061. The cubic root of 2147813 is about 129.0225107442.

The spelling of 2147813 in words is "two million, one hundred forty-seven thousand, eight hundred thirteen".