2431669021 has 2 divisors, whose sum is σ = 2431669022. Its totient is φ = 2431669020.

The previous prime is 2431669007. The next prime is 2431669027. The reversal of 2431669021 is 1209661342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2417688900 + 13980121 = 49170^2 + 3739^2 .

It is a cyclic number.

It is not a de Polignac number, because 2431669021 - 2¹⁷ = 2431537949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2431669027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215834510 + 1215834511.

It is an arithmetic number, because the mean of its divisors is an integer number (1215834511).

Almost surely, 2^2431669021 is an apocalyptic number.

It is an amenable number.

2431669021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2431669021 is an equidigital number, since it uses as much as digits as its factorization.

2431669021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 2431669021 is about 49311.9561668365. The cubic root of 2431669021 is about 1344.7291542908.

It can be divided in two parts, 243 and 1669021, that added together give a square (1669264 = 1292²).

The spelling of 2431669021 in words is "two billion, four hundred thirty-one million, six hundred sixty-nine thousand, twenty-one".