2447121631 has 2 divisors, whose sum is σ = 2447121632. Its totient is φ = 2447121630.

The previous prime is 2447121581. The next prime is 2447121637. The reversal of 2447121631 is 1361217442.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2447121631 - 2¹⁹ = 2446597343 is a prime.

It is a super-2 number, since 2×2447121631² = 11976808553816200322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2447121593 and 2447121602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2447121637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1223560815 + 1223560816.

It is an arithmetic number, because the mean of its divisors is an integer number (1223560816).

Almost surely, 2^2447121631 is an apocalyptic number.

2447121631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2447121631 is an equidigital number, since it uses as much as digits as its factorization.

2447121631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 2447121631 is about 49468.3902204226. The cubic root of 2447121631 is about 1347.5716071511.

The spelling of 2447121631 in words is "two billion, four hundred forty-seven million, one hundred twenty-one thousand, six hundred thirty-one".