82131502 has 4 divisors (see below), whose sum is σ = 123197256. Its totient is φ = 41065750.

The previous prime is 82131499. The next prime is 82131521. The reversal of 82131502 is 20513128.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20532874 + ... + 20532877.

It is an arithmetic number, because the mean of its divisors is an integer number (30799314).

Almost surely, 2^82131502 is an apocalyptic number.

82131502 is a deficient number, since it is larger than the sum of its proper divisors (41065754).

82131502 is a wasteful number, since it uses less digits than its factorization.

82131502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41065753.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 82131502 is about 9062.6432126615. The cubic root of 82131502 is about 434.6802635676.

It can be divided in two parts, 821 and 31502, that added together give a palindrome (32323).

The spelling of 82131502 in words is "eighty-two million, one hundred thirty-one thousand, five hundred two".