2140613561 has 2 divisors, whose sum is σ = 2140613562. Its totient is φ = 2140613560.

The previous prime is 2140613551. The next prime is 2140613593. The reversal of 2140613561 is 1653160412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1620545536 + 520068025 = 40256^2 + 22805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2140613561 is a prime.

It is not a weakly prime, because it can be changed into another prime (2140613551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070306780 + 1070306781.

It is an arithmetic number, because the mean of its divisors is an integer number (1070306781).

Almost surely, 2^2140613561 is an apocalyptic number.

It is an amenable number.

2140613561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140613561 is an equidigital number, since it uses as much as digits as its factorization.

2140613561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2140613561 is about 46266.7651884158. The cubic root of 2140613561 is about 1288.7818882110.

Adding to 2140613561 its reverse (1653160412), we get a palindrome (3793773973).

The spelling of 2140613561 in words is "two billion, one hundred forty million, six hundred thirteen thousand, five hundred sixty-one".