2531430989 has 2 divisors, whose sum is σ = 2531430990. Its totient is φ = 2531430988.

The previous prime is 2531430959. The next prime is 2531431033. The reversal of 2531430989 is 9890341352.

It is an a-pointer prime, because the next prime (2531431033) can be obtained adding 2531430989 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2428814089 + 102616900 = 49283^2 + 10130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2531430989 - 2¹⁶ = 2531365453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2531430959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265715494 + 1265715495.

It is an arithmetic number, because the mean of its divisors is an integer number (1265715495).

Almost surely, 2^2531430989 is an apocalyptic number.

It is an amenable number.

2531430989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531430989 is an equidigital number, since it uses as much as digits as its factorization.

2531430989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 2531430989 is about 50313.3281447372. The cubic root of 2531430989 is about 1362.8729257106.

The spelling of 2531430989 in words is "two billion, five hundred thirty-one million, four hundred thirty thousand, nine hundred eighty-nine".