23271520 has 48 divisors (see below), whose sum is σ = 56479248. Its totient is φ = 9054720.

The previous prime is 23271509. The next prime is 23271527. The reversal of 23271520 is 2517232.

It is a super-2 number, since 2×23271520² = 1083127286220800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23271491 and 23271500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23271527) 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, 3955 + ... + 7885.

It is an arithmetic number, because the mean of its divisors is an integer number (1176651).

Almost surely, 2^23271520 is an apocalyptic number.

23271520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23271520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28239624).

23271520 is an abundant number, since it is smaller than the sum of its proper divisors (33207728).

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

23271520 is a wasteful number, since it uses less digits than its factorization.

23271520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983 (or 3975 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 23271520 is about 4824.0563844134. The cubic root of 23271520 is about 285.5014052356.

Adding to 23271520 its reverse (2517232), we get a palindrome (25788752).

The spelling of 23271520 in words is "twenty-three million, two hundred seventy-one thousand, five hundred twenty".