28051431139 has 2 divisors, whose sum is σ = 28051431140. Its totient is φ = 28051431138.

The previous prime is 28051431131. The next prime is 28051431181. The reversal of 28051431139 is 93113415082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28051431139 - 2³ = 28051431131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28051431098 and 28051431107.

It is not a weakly prime, because it can be changed into another prime (28051431131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14025715569 + 14025715570.

It is an arithmetic number, because the mean of its divisors is an integer number (14025715570).

Almost surely, 2^28051431139 is an apocalyptic number.

28051431139 is a deficient number, since it is larger than the sum of its proper divisors (1).

28051431139 is an equidigital number, since it uses as much as digits as its factorization.

28051431139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 28051431139 in words is "twenty-eight billion, fifty-one million, four hundred thirty-one thousand, one hundred thirty-nine".