402231331 has 8 divisors (see below), whose sum is σ = 414214064. Its totient is φ = 390368160.

The previous prime is 402231299. The next prime is 402231341. The reversal of 402231331 is 133132204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402231331 - 2⁵ = 402231299 is a prime.

It is a super-2 number, since 2×402231331² = 323580087276063122, 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 = 402231299 and 402231308.

It is not an unprimeable number, because it can be changed into a prime (402231341) 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, 23040 + ... + 36541.

It is an arithmetic number, because the mean of its divisors is an integer number (51776758).

Almost surely, 2^402231331 is an apocalyptic number.

402231331 is a deficient number, since it is larger than the sum of its proper divisors (11982733).

402231331 is a wasteful number, since it uses less digits than its factorization.

402231331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59781.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 402231331 is about 20055.7056968834. The cubic root of 402231331 is about 738.1738090145.

Adding to 402231331 its reverse (133132204), we get a palindrome (535363535).

It can be divided in two parts, 4022 and 31331, that added together give a palindrome (35353).

The spelling of 402231331 in words is "four hundred two million, two hundred thirty-one thousand, three hundred thirty-one".