2143688551 has 2 divisors, whose sum is σ = 2143688552. Its totient is φ = 2143688550.

The previous prime is 2143688543. The next prime is 2143688557. The reversal of 2143688551 is 1558863412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2143688551 - 2³ = 2143688543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2143688498 and 2143688507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143688557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071844275 + 1071844276.

It is an arithmetic number, because the mean of its divisors is an integer number (1071844276).

Almost surely, 2^2143688551 is an apocalyptic number.

2143688551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143688551 is an equidigital number, since it uses as much as digits as its factorization.

2143688551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 43.

The square root of 2143688551 is about 46299.9843520492. The cubic root of 2143688551 is about 1289.3987044036.

The spelling of 2143688551 in words is "two billion, one hundred forty-three million, six hundred eighty-eight thousand, five hundred fifty-one".