2131223241 has 16 divisors (see below), whose sum is σ = 3438612864. Its totient is φ = 1146203904.

The previous prime is 2131223239. The next prime is 2131223249. The reversal of 2131223241 is 1423221312.

It is not a de Polignac number, because 2131223241 - 2¹ = 2131223239 is a prime.

It is a super-2 number, since 2×2131223241² = 9084225005957088162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2131223249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2984550 + ... + 2985263.

It is an arithmetic number, because the mean of its divisors is an integer number (214913304).

Almost surely, 2^2131223241 is an apocalyptic number.

2131223241 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2131223241 is a deficient number, since it is larger than the sum of its proper divisors (1307389623).

2131223241 is a wasteful number, since it uses less digits than its factorization.

2131223241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969840.

The product of its digits is 576, while the sum is 21.

The square root of 2131223241 is about 46165.1734644201. The cubic root of 2131223241 is about 1286.8946078471.

Adding to 2131223241 its reverse (1423221312), we get a palindrome (3554444553).

The spelling of 2131223241 in words is "two billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred forty-one".