82154612331 has 12 divisors (see below), whose sum is σ = 129455752920. Its totient is φ = 49790674080.

The previous prime is 82154612327. The next prime is 82154612339. The reversal of 82154612331 is 13321645128.

82154612331 is a `hidden beast` number, since 8 + 2 + 1 + 5 + 4 + 612 + 3 + 31 = 666.

It is not a de Polignac number, because 82154612331 - 2² = 82154612327 is a prime.

It is a super-2 number, since 2×82154612331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82154612339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 414922186 + ... + 414922383.

It is an arithmetic number, because the mean of its divisors is an integer number (10787979410).

Almost surely, 2^82154612331 is an apocalyptic number.

82154612331 is a deficient number, since it is larger than the sum of its proper divisors (47301140589).

82154612331 is a wasteful number, since it uses less digits than its factorization.

82154612331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829844586 (or 829844583 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 82154612331 in words is "eighty-two billion, one hundred fifty-four million, six hundred twelve thousand, three hundred thirty-one".