82278551 has 2 divisors, whose sum is σ = 82278552. Its totient is φ = 82278550.

The previous prime is 82278527. The next prime is 82278587. The reversal of 82278551 is 15587228.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82278551 - 2¹⁰ = 82277527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82278451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41139275 + 41139276.

It is an arithmetic number, because the mean of its divisors is an integer number (41139276).

Almost surely, 2^82278551 is an apocalyptic number.

82278551 is a deficient number, since it is larger than the sum of its proper divisors (1).

82278551 is an equidigital number, since it uses as much as digits as its factorization.

82278551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44800, while the sum is 38.

The square root of 82278551 is about 9070.7525046161. The cubic root of 82278551 is about 434.9395274196.

The spelling of 82278551 in words is "eighty-two million, two hundred seventy-eight thousand, five hundred fifty-one".