402143321234 has 4 divisors (see below), whose sum is σ = 603214981854. Its totient is φ = 201071660616.

The previous prime is 402143321227. The next prime is 402143321257. The reversal of 402143321234 is 432123341204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 394566141025 + 7577180209 = 628145^2 + 87047^2 .

It is a super-2 number, since 2×402143321234² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402143321197 and 402143321206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100535830307 + ... + 100535830310.

Almost surely, 2^402143321234 is an apocalyptic number.

402143321234 is a deficient number, since it is larger than the sum of its proper divisors (201071660620).

402143321234 is a wasteful number, since it uses less digits than its factorization.

402143321234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201071660619.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 402143321234 its reverse (432123341204), we get a palindrome (834266662438).

The spelling of 402143321234 in words is "four hundred two billion, one hundred forty-three million, three hundred twenty-one thousand, two hundred thirty-four".