82131450 has 48 divisors (see below), whose sum is σ = 207549216. Its totient is φ = 21486400.

The previous prime is 82131443. The next prime is 82131457. The reversal of 82131450 is 5413128.

It is an interprime number because it is at equal distance from previous prime (82131443) and next prime (82131457).

It is a self number, because there is not a number n which added to its sum of digits gives 82131450.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82131457) 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, 2785 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (4323942).

Almost surely, 2^82131450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82131450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103774608).

82131450 is an abundant number, since it is smaller than the sum of its proper divisors (125417766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82131450 is a wasteful number, since it uses less digits than its factorization.

82131450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10399 (or 10394 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 82131450 is about 9062.6403437409. The cubic root of 82131450 is about 434.6801718310.

Adding to 82131450 its reverse (5413128), we get a palindrome (87544578).

The spelling of 82131450 in words is "eighty-two million, one hundred thirty-one thousand, four hundred fifty".