235424021 has 16 divisors (see below), whose sum is σ = 281800704. Its totient is φ = 192299184.

The previous prime is 235424017. The next prime is 235424027. The reversal of 235424021 is 120424532.

It is a happy number.

It is not a de Polignac number, because 235424021 - 2² = 235424017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235424027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42980 + ... + 48146.

It is an arithmetic number, because the mean of its divisors is an integer number (17612544).

Almost surely, 2^235424021 is an apocalyptic number.

It is an amenable number.

235424021 is a deficient number, since it is larger than the sum of its proper divisors (46376683).

235424021 is a wasteful number, since it uses less digits than its factorization.

235424021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5480.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 235424021 is about 15343.5335239312. The cubic root of 235424021 is about 617.4715103205.

Adding to 235424021 its reverse (120424532), we get a palindrome (355848553).

The spelling of 235424021 in words is "two hundred thirty-five million, four hundred twenty-four thousand, twenty-one".