2361540721 has 2 divisors, whose sum is σ = 2361540722. Its totient is φ = 2361540720.

The previous prime is 2361540719. The next prime is 2361540733. The reversal of 2361540721 is 1270451632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2238330721 + 123210000 = 47311^2 + 11100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2361540721 - 2¹ = 2361540719 is a prime.

Together with 2361540719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2361540751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1180770360 + 1180770361.

It is an arithmetic number, because the mean of its divisors is an integer number (1180770361).

Almost surely, 2^2361540721 is an apocalyptic number.

It is an amenable number.

2361540721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2361540721 is an equidigital number, since it uses as much as digits as its factorization.

2361540721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2361540721 is about 48595.6862385953. The cubic root of 2361540721 is about 1331.6757141544.

The spelling of 2361540721 in words is "two billion, three hundred sixty-one million, five hundred forty thousand, seven hundred twenty-one".