402400344211 has 4 divisors (see below), whose sum is σ = 426070952712. Its totient is φ = 378729735712.

The previous prime is 402400344191. The next prime is 402400344233. The reversal of 402400344211 is 112443004204.

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

It is a cyclic number.

It is not a de Polignac number, because 402400344211 - 2¹⁹ = 402399819923 is a prime.

It is a super-2 number, since 2×402400344211² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402400344251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11835304225 + ... + 11835304258.

It is an arithmetic number, because the mean of its divisors is an integer number (106517738178).

Almost surely, 2^402400344211 is an apocalyptic number.

402400344211 is a deficient number, since it is larger than the sum of its proper divisors (23670608501).

402400344211 is a wasteful number, since it uses less digits than its factorization.

402400344211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23670608500.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 402400344211 its reverse (112443004204), we get a palindrome (514843348415).

The spelling of 402400344211 in words is "four hundred two billion, four hundred million, three hundred forty-four thousand, two hundred eleven".