42400343431 has 4 divisors (see below), whose sum is σ = 42430016200. Its totient is φ = 42370670664.

The previous prime is 42400343429. The next prime is 42400343509. The reversal of 42400343431 is 13434300424.

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 42400343431 - 2¹ = 42400343429 is a prime.

It is a super-2 number, since 2×42400343431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42400343431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42400343411) 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, 14834241 + ... + 14837098.

It is an arithmetic number, because the mean of its divisors is an integer number (10607504050).

Almost surely, 2^42400343431 is an apocalyptic number.

42400343431 is a deficient number, since it is larger than the sum of its proper divisors (29672769).

42400343431 is a wasteful number, since it uses less digits than its factorization.

42400343431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29672768.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 42400343431 its reverse (13434300424), we get a palindrome (55834643855).

The spelling of 42400343431 in words is "forty-two billion, four hundred million, three hundred forty-three thousand, four hundred thirty-one".