235222021 has 4 divisors (see below), whose sum is σ = 235253772. Its totient is φ = 235190272.

The previous prime is 235222019. The next prime is 235222037. The reversal of 235222021 is 120222532.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 127373796 + 107848225 = 11286^2 + 10385^2 .

It is a cyclic number.

It is not a de Polignac number, because 235222021 - 2¹ = 235222019 is a prime.

It is a super-5 number, since 5×235222021⁵ (a number of 43 digits) contains 55555 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 235222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235822021) 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, 1791 + ... + 21763.

It is an arithmetic number, because the mean of its divisors is an integer number (58813443).

Almost surely, 2^235222021 is an apocalyptic number.

It is an amenable number.

235222021 is a deficient number, since it is larger than the sum of its proper divisors (31751).

235222021 is a wasteful number, since it uses less digits than its factorization.

235222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31750.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 235222021 is about 15336.9495337241. The cubic root of 235222021 is about 617.2948575229.

Adding to 235222021 its reverse (120222532), we get a palindrome (355444553).

The spelling of 235222021 in words is "two hundred thirty-five million, two hundred twenty-two thousand, twenty-one".