402011331 has 8 divisors (see below), whose sum is σ = 537366864. Its totient is φ = 267331680.

The previous prime is 402011303. The next prime is 402011353. The reversal of 402011331 is 133110204.

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

It is not a de Polignac number, because 402011331 - 2⁵ = 402011299 is a prime.

It is a super-3 number, since 3×402011331³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 402011331.

It is not an unprimeable number, because it can be changed into a prime (402010331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167580 + ... + 169961.

It is an arithmetic number, because the mean of its divisors is an integer number (67170858).

Almost surely, 2^402011331 is an apocalyptic number.

402011331 is a deficient number, since it is larger than the sum of its proper divisors (135355533).

402011331 is a wasteful number, since it uses less digits than its factorization.

402011331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337941.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 402011331 is about 20050.2202232295. The cubic root of 402011331 is about 738.0392033434.

Adding to 402011331 its reverse (133110204), we get a palindrome (535121535).

It can be divided in two parts, 4020 and 11331, that added together give a palindrome (15351).

The spelling of 402011331 in words is "four hundred two million, eleven thousand, three hundred thirty-one".