82151855 has 16 divisors (see below), whose sum is σ = 101274624. Its totient is φ = 63947520.

The previous prime is 82151843. The next prime is 82151857. The reversal of 82151855 is 55815128.

It is a de Polignac number, because none of the positive numbers 2^k-82151855 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 (82151857) 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, 32435 + ... + 34875.

It is an arithmetic number, because the mean of its divisors is an integer number (6329664).

Almost surely, 2^82151855 is an apocalyptic number.

82151855 is a deficient number, since it is larger than the sum of its proper divisors (19122769).

82151855 is a wasteful number, since it uses less digits than its factorization.

82151855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626.

The product of its digits is 16000, while the sum is 35.

The square root of 82151855 is about 9063.7660494962. The cubic root of 82151855 is about 434.7161666275.

The spelling of 82151855 in words is "eighty-two million, one hundred fifty-one thousand, eight hundred fifty-five".