2420221631 has 2 divisors, whose sum is σ = 2420221632. Its totient is φ = 2420221630.

The previous prime is 2420221607. The next prime is 2420221669. The reversal of 2420221631 is 1361220242.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2420221631 - 2²⁶ = 2353112767 is a prime.

It is a super-2 number, since 2×2420221631² = 11714945486320600322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2420221597 and 2420221606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2420221931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210110815 + 1210110816.

It is an arithmetic number, because the mean of its divisors is an integer number (1210110816).

Almost surely, 2^2420221631 is an apocalyptic number.

2420221631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2420221631 is an equidigital number, since it uses as much as digits as its factorization.

2420221631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2420221631 is about 49195.7480987941. The cubic root of 2420221631 is about 1342.6156733646.

Adding to 2420221631 its reverse (1361220242), we get a palindrome (3781441873).

The spelling of 2420221631 in words is "two billion, four hundred twenty million, two hundred twenty-one thousand, six hundred thirty-one".