28542551 has 2 divisors, whose sum is σ = 28542552. Its totient is φ = 28542550.

The previous prime is 28542539. The next prime is 28542581. The reversal of 28542551 is 15524582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28542551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28542581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14271275 + 14271276.

It is an arithmetic number, because the mean of its divisors is an integer number (14271276).

Almost surely, 2^28542551 is an apocalyptic number.

28542551 is a deficient number, since it is larger than the sum of its proper divisors (1).

28542551 is an equidigital number, since it uses as much as digits as its factorization.

28542551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16000, while the sum is 32.

The square root of 28542551 is about 5342.5229058938. The cubic root of 28542551 is about 305.6076785474.

The spelling of 28542551 in words is "twenty-eight million, five hundred forty-two thousand, five hundred fifty-one".