2152663561 has 2 divisors, whose sum is σ = 2152663562. Its totient is φ = 2152663560.

The previous prime is 2152663547. The next prime is 2152663621. The reversal of 2152663561 is 1653662512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1378711161 + 773952400 = 37131^2 + 27820^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152663561 - 2²¹ = 2150566409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2152663561.

It is not a weakly prime, because it can be changed into another prime (2152663511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076331780 + 1076331781.

It is an arithmetic number, because the mean of its divisors is an integer number (1076331781).

Almost surely, 2^2152663561 is an apocalyptic number.

It is an amenable number.

2152663561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152663561 is an equidigital number, since it uses as much as digits as its factorization.

2152663561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 2152663561 is about 46396.8055042586. The cubic root of 2152663561 is about 1291.1956466661.

The spelling of 2152663561 in words is "two billion, one hundred fifty-two million, six hundred sixty-three thousand, five hundred sixty-one".