2431145021 has 2 divisors, whose sum is σ = 2431145022. Its totient is φ = 2431145020.

The previous prime is 2431144997. The next prime is 2431145089. The reversal of 2431145021 is 1205411342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2240980921 + 190164100 = 47339^2 + 13790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2431145021 - 2²² = 2426950717 is a prime.

It is a super-2 number, since 2×2431145021² = 11820932226266180882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2431145221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215572510 + 1215572511.

It is an arithmetic number, because the mean of its divisors is an integer number (1215572511).

Almost surely, 2^2431145021 is an apocalyptic number.

It is an amenable number.

2431145021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2431145021 is an equidigital number, since it uses as much as digits as its factorization.

2431145021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2431145021 is about 49306.6427674811. The cubic root of 2431145021 is about 1344.6325555225.

Adding to 2431145021 its reverse (1205411342), we get a palindrome (3636556363).

The spelling of 2431145021 in words is "two billion, four hundred thirty-one million, one hundred forty-five thousand, twenty-one".