2131774643 has 2 divisors, whose sum is σ = 2131774644. Its totient is φ = 2131774642.

The previous prime is 2131774637. The next prime is 2131774657. The reversal of 2131774643 is 3464771312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131774643 - 2¹² = 2131770547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131774597 and 2131774606.

It is not a weakly prime, because it can be changed into another prime (2131774693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065887321 + 1065887322.

It is an arithmetic number, because the mean of its divisors is an integer number (1065887322).

Almost surely, 2^2131774643 is an apocalyptic number.

2131774643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131774643 is an equidigital number, since it uses as much as digits as its factorization.

2131774643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 38.

The square root of 2131774643 is about 46171.1451341636. The cubic root of 2131774643 is about 1287.0055824678.

The spelling of 2131774643 in words is "two billion, one hundred thirty-one million, seven hundred seventy-four thousand, six hundred forty-three".