82618261 has 16 divisors (see below), whose sum is σ = 92153088. Its totient is φ = 73440000.

The previous prime is 82618259. The next prime is 82618309. The reversal of 82618261 is 16281628.

It is a cyclic number.

It is not a de Polignac number, because 82618261 - 2¹ = 82618259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82618661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109636 + ... + 110386.

It is an arithmetic number, because the mean of its divisors is an integer number (5759568).

Almost surely, 2^82618261 is an apocalyptic number.

It is an amenable number.

82618261 is a deficient number, since it is larger than the sum of its proper divisors (9534827).

82618261 is a wasteful number, since it uses less digits than its factorization.

82618261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972.

The product of its digits is 9216, while the sum is 34.

The square root of 82618261 is about 9089.4587847682. The cubic root of 82618261 is about 435.5372952999.

Adding to 82618261 its reverse (16281628), we get a palindrome (98899889).

The spelling of 82618261 in words is "eighty-two million, six hundred eighteen thousand, two hundred sixty-one".