2431630021 has 2 divisors, whose sum is σ = 2431630022. Its totient is φ = 2431630020.

The previous prime is 2431629979. The next prime is 2431630027. The reversal of 2431630021 is 1200361342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2319481921 + 112148100 = 48161^2 + 10590^2 .

It is a cyclic number.

It is not a de Polignac number, because 2431630021 - 2¹¹ = 2431627973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2431629974 and 2431630001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2431630027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215815010 + 1215815011.

It is an arithmetic number, because the mean of its divisors is an integer number (1215815011).

Almost surely, 2^2431630021 is an apocalyptic number.

It is an amenable number.

2431630021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2431630021 is an equidigital number, since it uses as much as digits as its factorization.

2431630021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2431630021 is about 49311.5607236275. The cubic root of 2431630021 is about 1344.7219651658.

Adding to 2431630021 its reverse (1200361342), we get a palindrome (3631991363).

The spelling of 2431630021 in words is "two billion, four hundred thirty-one million, six hundred thirty thousand, twenty-one".