402143231 has 8 divisors (see below), whose sum is σ = 459715584. Its totient is φ = 344601720.

The previous prime is 402143213. The next prime is 402143281. The reversal of 402143231 is 132341204.

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 402143231 - 2²⁶ = 335034367 is a prime.

It is a super-2 number, since 2×402143231² = 323438356478238722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402143281) 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, 39626 + ... + 48728.

It is an arithmetic number, because the mean of its divisors is an integer number (57464448).

Almost surely, 2^402143231 is an apocalyptic number.

402143231 is a deficient number, since it is larger than the sum of its proper divisors (57572353).

402143231 is an equidigital number, since it uses as much as digits as its factorization.

402143231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15421.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 402143231 is about 20053.5091941535. The cubic root of 402143231 is about 738.1199114551.

Adding to 402143231 its reverse (132341204), we get a palindrome (534484435).

The spelling of 402143231 in words is "four hundred two million, one hundred forty-three thousand, two hundred thirty-one".