82505031 has 8 divisors (see below), whose sum is σ = 125721984. Its totient is φ = 47145720.

The previous prime is 82504963. The next prime is 82505051. The reversal of 82505031 is 13050528.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82505031 - 2¹¹ = 82502983 is a prime.

It is a super-2 number, since 2×82505031² = 13614160280621922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82504992 and 82505010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82505051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1964385 + ... + 1964426.

It is an arithmetic number, because the mean of its divisors is an integer number (15715248).

Almost surely, 2^82505031 is an apocalyptic number.

82505031 is a deficient number, since it is larger than the sum of its proper divisors (43216953).

82505031 is a wasteful number, since it uses less digits than its factorization.

82505031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928821.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 82505031 is about 9083.2280055055. The cubic root of 82505031 is about 435.3382334379.

Adding to 82505031 its reverse (13050528), we get a palindrome (95555559).

The spelling of 82505031 in words is "eighty-two million, five hundred five thousand, thirty-one".