82511955 has 24 divisors (see below), whose sum is σ = 145370160. Its totient is φ = 43283520.

The previous prime is 82511953. The next prime is 82511963. The reversal of 82511955 is 55911528.

It is a happy number.

It is not a de Polignac number, because 82511955 - 2¹ = 82511953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82511953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12285 + ... + 17774.

It is an arithmetic number, because the mean of its divisors is an integer number (6057090).

Almost surely, 2^82511955 is an apocalyptic number.

82511955 is a deficient number, since it is larger than the sum of its proper divisors (62858205).

82511955 is a wasteful number, since it uses less digits than its factorization.

82511955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30131 (or 30128 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

The square root of 82511955 is about 9083.6091395436. The cubic root of 82511955 is about 435.3504112715.

The spelling of 82511955 in words is "eighty-two million, five hundred eleven thousand, nine hundred fifty-five".