402340213131 has 4 divisors (see below), whose sum is σ = 536453617512. Its totient is φ = 268226808752.

The previous prime is 402340213117. The next prime is 402340213237. The reversal of 402340213131 is 131312043204.

It is a happy number.

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 402340213131 - 2⁷ = 402340213003 is a prime.

It is a super-2 number, since 2×402340213131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402340213531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67056702186 + ... + 67056702191.

It is an arithmetic number, because the mean of its divisors is an integer number (134113404378).

Almost surely, 2^402340213131 is an apocalyptic number.

402340213131 is a deficient number, since it is larger than the sum of its proper divisors (134113404381).

402340213131 is a wasteful number, since it uses less digits than its factorization.

402340213131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134113404380.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 402340213131 its reverse (131312043204), we get a palindrome (533652256335).

The spelling of 402340213131 in words is "four hundred two billion, three hundred forty million, two hundred thirteen thousand, one hundred thirty-one".