2152735561 has 4 divisors (see below), whose sum is σ = 2152858500. Its totient is φ = 2152612624.

The previous prime is 2152735547. The next prime is 2152735579. The reversal of 2152735561 is 1655372512.

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 525097225 + 1627638336 = 22915^2 + 40344^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152735561 - 2⁷ = 2152735433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2152735561.

It is not an unprimeable number, because it can be changed into a prime (2152735261) 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, 29746 + ... + 72043.

It is an arithmetic number, because the mean of its divisors is an integer number (538214625).

Almost surely, 2^2152735561 is an apocalyptic number.

It is an amenable number.

2152735561 is a deficient number, since it is larger than the sum of its proper divisors (122939).

2152735561 is a wasteful number, since it uses less digits than its factorization.

2152735561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122938.

The product of its digits is 63000, while the sum is 37.

The square root of 2152735561 is about 46397.5814132590. The cubic root of 2152735561 is about 1291.2100420183.

The spelling of 2152735561 in words is "two billion, one hundred fifty-two million, seven hundred thirty-five thousand, five hundred sixty-one".