23501 has 4 divisors (see below), whose sum is σ = 23904.
Its totient is φ = 23100.
The previous prime is 23497. The next prime is 23509. The reversal of 23501 is 10532.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 23501 - 22 = 23497 is a prime.
It is a Duffinian number.
It is a plaindrome in base 16.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (23509) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95 + ... + 236.
It is an arithmetic number, because the mean of its divisors is an integer number (5976).
223501 is an apocalyptic number.
It is an amenable number.
23501 is a deficient number, since it is larger than the sum of its proper divisors (403).
23501 is an equidigital number, since it uses as much as digits as its factorization.
23501 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 402.
The product of its (nonzero) digits is 30, while the sum is 11.
The square root of 23501 is about 153.3003587732.
The cubic root of 23501 is about 28.6436778617.
The spelling of 23501 in words is "twenty-three thousand, five hundred one".