2048631391 has 2 divisors, whose sum is σ = 2048631392. Its totient is φ = 2048631390.

The previous prime is 2048631383. The next prime is 2048631443. The reversal of 2048631391 is 1931368402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2048631391 - 2³ = 2048631383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2048631391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2048631301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1024315695 + 1024315696.

It is an arithmetic number, because the mean of its divisors is an integer number (1024315696).

Almost surely, 2^2048631391 is an apocalyptic number.

2048631391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2048631391 is an equidigital number, since it uses as much as digits as its factorization.

2048631391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 2048631391 is about 45261.8094092580. The cubic root of 2048631391 is about 1270.0513321678.

Adding to 2048631391 its reverse (1931368402), we get a palindrome (3979999793).

The spelling of 2048631391 in words is "two billion, forty-eight million, six hundred thirty-one thousand, three hundred ninety-one".