2231540131 has 4 divisors (see below), whose sum is σ = 2243869264. Its totient is φ = 2219211000.

The previous prime is 2231540117. The next prime is 2231540137. The reversal of 2231540131 is 1310451322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1310451322 = 2 ⋅655225661.

It is a cyclic number.

It is not a de Polignac number, because 2231540131 - 2⁵ = 2231540099 is a prime.

It is a super-3 number, since 3×2231540131³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231540137) 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, 6164295 + ... + 6164656.

It is an arithmetic number, because the mean of its divisors is an integer number (560967316).

Almost surely, 2^2231540131 is an apocalyptic number.

2231540131 is a deficient number, since it is larger than the sum of its proper divisors (12329133).

2231540131 is a wasteful number, since it uses less digits than its factorization.

2231540131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12329132.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2231540131 is about 47239.1800415714. The cubic root of 2231540131 is about 1306.7772560228. Note that the first 3 decimals are identical.

Adding to 2231540131 its reverse (1310451322), we get a palindrome (3541991453).

The spelling of 2231540131 in words is "two billion, two hundred thirty-one million, five hundred forty thousand, one hundred thirty-one".