2340213581 has 2 divisors, whose sum is σ = 2340213582. Its totient is φ = 2340213580.

The previous prime is 2340213433. The next prime is 2340213607. The reversal of 2340213581 is 1853120432.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2214549481 + 125664100 = 47059^2 + 11210^2 .

It is a cyclic number.

It is not a de Polignac number, because 2340213581 - 2¹⁰ = 2340212557 is a prime.

It is a super-2 number, since 2×2340213581² = 10953199209393687122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2340213181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1170106790 + 1170106791.

It is an arithmetic number, because the mean of its divisors is an integer number (1170106791).

Almost surely, 2^2340213581 is an apocalyptic number.

It is an amenable number.

2340213581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2340213581 is an equidigital number, since it uses as much as digits as its factorization.

2340213581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 2340213581 is about 48375.7540613064. The cubic root of 2340213581 is about 1327.6547852281.

The spelling of 2340213581 in words is "two billion, three hundred forty million, two hundred thirteen thousand, five hundred eighty-one".