2131321245 has 32 divisors (see below), whose sum is σ = 3499130880. Its totient is φ = 1107125760.

The previous prime is 2131321223. The next prime is 2131321261. The reversal of 2131321245 is 5421231312.

It is not a de Polignac number, because 2131321245 - 2¹³ = 2131313053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 413796 + ... + 418914.

It is an arithmetic number, because the mean of its divisors is an integer number (109347840).

Almost surely, 2^2131321245 is an apocalyptic number.

It is an amenable number.

2131321245 is a deficient number, since it is larger than the sum of its proper divisors (1367809635).

2131321245 is a wasteful number, since it uses less digits than its factorization.

2131321245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5845.

The product of its digits is 1440, while the sum is 24.

The square root of 2131321245 is about 46166.2349017114. The cubic root of 2131321245 is about 1286.9143334337.

Adding to 2131321245 its reverse (5421231312), we get a palindrome (7552552557).

The spelling of 2131321245 in words is "two billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred forty-five".