83431530 has 192 divisors, whose sum is σ = 272982528. Its totient is φ = 17210880.

The previous prime is 83431483. The next prime is 83431531. The reversal of 83431530 is 3513438.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 83431494 and 83431503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83431531) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 499507 + ... + 499673.

It is an arithmetic number, because the mean of its divisors is an integer number (1421784).

Almost surely, 2^83431530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83431530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136491264).

83431530 is an abundant number, since it is smaller than the sum of its proper divisors (189550998).

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

83431530 is a wasteful number, since it uses less digits than its factorization.

83431530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 83431530 is about 9134.0861611877. The cubic root of 83431530 is about 436.9617304030.

Adding to 83431530 its reverse (3513438), we get a palindrome (86944968).

The spelling of 83431530 in words is "eighty-three million, four hundred thirty-one thousand, five hundred thirty".