2421731761 has 2 divisors, whose sum is σ = 2421731762. Its totient is φ = 2421731760.

The previous prime is 2421731723. The next prime is 2421731803. The reversal of 2421731761 is 1671371242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1932481600 + 489250161 = 43960^2 + 22119^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421731761 - 2²⁵ = 2388177329 is a prime.

It is a super-2 number, since 2×2421731761² = 11729569444472322242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2421731701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210865880 + 1210865881.

It is an arithmetic number, because the mean of its divisors is an integer number (1210865881).

Almost surely, 2^2421731761 is an apocalyptic number.

It is an amenable number.

2421731761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421731761 is an equidigital number, since it uses as much as digits as its factorization.

2421731761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 2421731761 is about 49211.0938813597. The cubic root of 2421731761 is about 1342.8948630370.

The spelling of 2421731761 in words is "two billion, four hundred twenty-one million, seven hundred thirty-one thousand, seven hundred sixty-one".