82121375 has 32 divisors (see below), whose sum is σ = 118210560. Its totient is φ = 55792800.

The previous prime is 82121371. The next prime is 82121381. The reversal of 82121375 is 57312128.

It is not a de Polignac number, because 82121375 - 2² = 82121371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82121371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110756 + ... + 111494.

It is an arithmetic number, because the mean of its divisors is an integer number (3694080).

Almost surely, 2^82121375 is an apocalyptic number.

82121375 is a deficient number, since it is larger than the sum of its proper divisors (36089185).

82121375 is a wasteful number, since it uses less digits than its factorization.

82121375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888 (or 878 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 82121375 is about 9062.0844732324. The cubic root of 82121375 is about 434.6623971466.

The spelling of 82121375 in words is "eighty-two million, one hundred twenty-one thousand, three hundred seventy-five".