83431520 has 24 divisors (see below), whose sum is σ = 197107344. Its totient is φ = 33372544.

The previous prime is 83431483. The next prime is 83431531. The reversal of 83431520 is 2513438.

It is a self number, because there is not a number n which added to its sum of digits gives 83431520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260564 + ... + 260883.

It is an arithmetic number, because the mean of its divisors is an integer number (8212806).

Almost surely, 2^83431520 is an apocalyptic number.

83431520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83431520 is an abundant number, since it is smaller than the sum of its proper divisors (113675824).

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

83431520 is a wasteful number, since it uses less digits than its factorization.

83431520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521462 (or 521454 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 83431520 is about 9134.0856137875. The cubic root of 83431520 is about 436.9617129451.

Adding to 83431520 its reverse (2513438), we get a palindrome (85944958).

The spelling of 83431520 in words is "eighty-three million, four hundred thirty-one thousand, five hundred twenty".