402220131431 has 4 divisors (see below), whose sum is σ = 413090945832. Its totient is φ = 391349317032.

The previous prime is 402220131413. The next prime is 402220131437. The reversal of 402220131431 is 134131022204.

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 402220131431 - 2²² = 402215937127 is a prime.

It is a super-2 number, since 2×402220131431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402220131397 and 402220131406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402220131437) 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, 5435407145 + ... + 5435407218.

It is an arithmetic number, because the mean of its divisors is an integer number (103272736458).

Almost surely, 2^402220131431 is an apocalyptic number.

402220131431 is a deficient number, since it is larger than the sum of its proper divisors (10870814401).

402220131431 is a wasteful number, since it uses less digits than its factorization.

402220131431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10870814400.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 402220131431 its reverse (134131022204), we get a palindrome (536351153635).

The spelling of 402220131431 in words is "four hundred two billion, two hundred twenty million, one hundred thirty-one thousand, four hundred thirty-one".