2231987539 has 2 divisors, whose sum is σ = 2231987540. Its totient is φ = 2231987538.

The previous prime is 2231987509. The next prime is 2231987573. The reversal of 2231987539 is 9357891322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2231987539 - 2⁷ = 2231987411 is a prime.

It is a super-3 number, since 3×2231987539³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2231987492 and 2231987501.

It is not a weakly prime, because it can be changed into another prime (2231987509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115993769 + 1115993770.

It is an arithmetic number, because the mean of its divisors is an integer number (1115993770).

Almost surely, 2^2231987539 is an apocalyptic number.

2231987539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231987539 is an equidigital number, since it uses as much as digits as its factorization.

2231987539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 2231987539 is about 47243.9153648383. The cubic root of 2231987539 is about 1306.8645833834.

The spelling of 2231987539 in words is "two billion, two hundred thirty-one million, nine hundred eighty-seven thousand, five hundred thirty-nine".