23521401 has 8 divisors (see below), whose sum is σ = 34846560. Its totient is φ = 15680916.

The previous prime is 23521391. The next prime is 23521409. The reversal of 23521401 is 10412532.

It is not a de Polignac number, because 23521401 - 2⁵ = 23521369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23521409) 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, 435555 + ... + 435608.

It is an arithmetic number, because the mean of its divisors is an integer number (4355820).

Almost surely, 2^23521401 is an apocalyptic number.

It is an amenable number.

23521401 is a deficient number, since it is larger than the sum of its proper divisors (11325159).

23521401 is an equidigital number, since it uses as much as digits as its factorization.

23521401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871172 (or 871166 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 23521401 is about 4849.8866997075. The cubic root of 23521401 is about 286.5196390145.

Adding to 23521401 its reverse (10412532), we get a palindrome (33933933).

The spelling of 23521401 in words is "twenty-three million, five hundred twenty-one thousand, four hundred one".