28550031551 has 2 divisors, whose sum is σ = 28550031552. Its totient is φ = 28550031550.

The previous prime is 28550031527. The next prime is 28550031571. The reversal of 28550031551 is 15513005582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28550031551 - 2¹⁸ = 28549769407 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28550031571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14275015775 + 14275015776.

It is an arithmetic number, because the mean of its divisors is an integer number (14275015776).

Almost surely, 2^28550031551 is an apocalyptic number.

28550031551 is a deficient number, since it is larger than the sum of its proper divisors (1).

28550031551 is an equidigital number, since it uses as much as digits as its factorization.

28550031551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 28550031551 in words is "twenty-eight billion, five hundred fifty million, thirty-one thousand, five hundred fifty-one".