21241431359 has 2 divisors, whose sum is σ = 21241431360. Its totient is φ = 21241431358.

The previous prime is 21241431287. The next prime is 21241431373. The reversal of 21241431359 is 95313414212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21241431359 - 2²⁰ = 21240382783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21241431389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620715679 + 10620715680.

It is an arithmetic number, because the mean of its divisors is an integer number (10620715680).

Almost surely, 2^21241431359 is an apocalyptic number.

21241431359 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241431359 is an equidigital number, since it uses as much as digits as its factorization.

21241431359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The spelling of 21241431359 in words is "twenty-one billion, two hundred forty-one million, four hundred thirty-one thousand, three hundred fifty-nine".