2231251531 has 2 divisors, whose sum is σ = 2231251532. Its totient is φ = 2231251530.

The previous prime is 2231251493. The next prime is 2231251541. The reversal of 2231251531 is 1351521322.

2231251531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2231251531 - 2⁹ = 2231251019 is a prime.

It is a super-3 number, since 3×2231251531³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2231251496 and 2231251505.

It is not a weakly prime, because it can be changed into another prime (2231251541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115625765 + 1115625766.

It is an arithmetic number, because the mean of its divisors is an integer number (1115625766).

Almost surely, 2^2231251531 is an apocalyptic number.

2231251531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231251531 is an equidigital number, since it uses as much as digits as its factorization.

2231251531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 2231251531 is about 47236.1252750477. The cubic root of 2231251531 is about 1306.7209194192.

Adding to 2231251531 its reverse (1351521322), we get a palindrome (3582772853).

The spelling of 2231251531 in words is "two billion, two hundred thirty-one million, two hundred fifty-one thousand, five hundred thirty-one".