2131651241 has 4 divisors (see below), whose sum is σ = 2134916292. Its totient is φ = 2128386192.

The previous prime is 2131651219. The next prime is 2131651259. The reversal of 2131651241 is 1421561312.

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 672105625 + 1459545616 = 25925^2 + 38204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131651241 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 2131651241.

It is not an unprimeable number, because it can be changed into a prime (2131651271) 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, 1631546 + ... + 1632851.

It is an arithmetic number, because the mean of its divisors is an integer number (533729073).

Almost surely, 2^2131651241 is an apocalyptic number.

It is an amenable number.

2131651241 is a deficient number, since it is larger than the sum of its proper divisors (3265051).

2131651241 is an equidigital number, since it uses as much as digits as its factorization.

2131651241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265050.

The product of its digits is 1440, while the sum is 26.

The square root of 2131651241 is about 46169.8087607042. The cubic root of 2131651241 is about 1286.9807483657.

The spelling of 2131651241 in words is "two billion, one hundred thirty-one million, six hundred fifty-one thousand, two hundred forty-one".