82154320 has 40 divisors (see below), whose sum is σ = 191389536. Its totient is φ = 32796288.

The previous prime is 82154269. The next prime is 82154341. The reversal of 82154320 is 2345128.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70059 + ... + 71221.

Almost surely, 2^82154320 is an apocalyptic number.

82154320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82154320 is an abundant number, since it is smaller than the sum of its proper divisors (109235216).

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

82154320 is a wasteful number, since it uses less digits than its factorization.

82154320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059 (or 2053 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 82154320 is about 9063.9020294794. The cubic root of 82154320 is about 434.7205145294.

Adding to 82154320 its reverse (2345128), we get a palindrome (84499448).

The spelling of 82154320 in words is "eighty-two million, one hundred fifty-four thousand, three hundred twenty".