402241231 has 4 divisors (see below), whose sum is σ = 459704272. Its totient is φ = 344778192.

The previous prime is 402241193. The next prime is 402241247. The reversal of 402241231 is 132142204.

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 402241231 - 2¹¹ = 402239183 is a prime.

It is a super-2 number, since 2×402241231² = 323596015832790722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402241199 and 402241208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402241271) 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, 28731510 + ... + 28731523.

It is an arithmetic number, because the mean of its divisors is an integer number (114926068).

Almost surely, 2^402241231 is an apocalyptic number.

402241231 is a deficient number, since it is larger than the sum of its proper divisors (57463041).

402241231 is an equidigital number, since it uses as much as digits as its factorization.

402241231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57463040.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 402241231 is about 20055.9525079214. The cubic root of 402241231 is about 738.1798651156.

Adding to 402241231 its reverse (132142204), we get a palindrome (534383435).

The spelling of 402241231 in words is "four hundred two million, two hundred forty-one thousand, two hundred thirty-one".