402012231 has 8 divisors (see below), whose sum is σ = 537009264. Its totient is φ = 267511680.

The previous prime is 402012229. The next prime is 402012263. The reversal of 402012231 is 132210204.

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

It is not a de Polignac number, because 402012231 - 2¹ = 402012229 is a prime.

It is a super-2 number, since 2×402012231² = 323227667747194722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 402012231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406012231) 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, 122226 + ... + 125471.

It is an arithmetic number, because the mean of its divisors is an integer number (67126158).

Almost surely, 2^402012231 is an apocalyptic number.

402012231 is a deficient number, since it is larger than the sum of its proper divisors (134997033).

402012231 is a wasteful number, since it uses less digits than its factorization.

402012231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248241.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 402012231 is about 20050.2426668607. The cubic root of 402012231 is about 738.0397541030.

Adding to 402012231 its reverse (132210204), we get a palindrome (534222435).

The spelling of 402012231 in words is "four hundred two million, twelve thousand, two hundred thirty-one".