82261147 has 4 divisors (see below), whose sum is σ = 87100056. Its totient is φ = 77422240.

The previous prime is 82261121. The next prime is 82261213. The reversal of 82261147 is 74116228.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82261147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82261117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2419429 + ... + 2419462.

It is an arithmetic number, because the mean of its divisors is an integer number (21775014).

Almost surely, 2^82261147 is an apocalyptic number.

82261147 is a deficient number, since it is larger than the sum of its proper divisors (4838909).

82261147 is a wasteful number, since it uses less digits than its factorization.

82261147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838908.

The product of its digits is 5376, while the sum is 31.

The square root of 82261147 is about 9069.7931067914. The cubic root of 82261147 is about 434.9088583439.

The spelling of 82261147 in words is "eighty-two million, two hundred sixty-one thousand, one hundred forty-seven".