2152541261 has 4 divisors (see below), whose sum is σ = 2318121372. Its totient is φ = 1986961152.

The previous prime is 2152541213. The next prime is 2152541263. The reversal of 2152541261 is 1621452512.

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 141467236 + 2011074025 = 11894^2 + 44845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2152541261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152541263) 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, 82790036 + ... + 82790061.

It is an arithmetic number, because the mean of its divisors is an integer number (579530343).

Almost surely, 2^2152541261 is an apocalyptic number.

It is an amenable number.

2152541261 is a deficient number, since it is larger than the sum of its proper divisors (165580111).

2152541261 is a wasteful number, since it uses less digits than its factorization.

2152541261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165580110.

The product of its digits is 4800, while the sum is 29.

The square root of 2152541261 is about 46395.4875068686. The cubic root of 2152541261 is about 1291.1711938253.

Adding to 2152541261 its reverse (1621452512), we get a palindrome (3773993773).

The spelling of 2152541261 in words is "two billion, one hundred fifty-two million, five hundred forty-one thousand, two hundred sixty-one".