42400242331 has 4 divisors (see below), whose sum is σ = 44243731152. Its totient is φ = 40556753512.

The previous prime is 42400242299. The next prime is 42400242349. The reversal of 42400242331 is 13324200424.

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 42400242331 - 2⁵ = 42400242299 is a prime.

It is a super-2 number, since 2×42400242331² (a number of 22 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 = 42400242296 and 42400242305.

It is not an unprimeable number, because it can be changed into a prime (42400242431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921744376 + ... + 921744421.

It is an arithmetic number, because the mean of its divisors is an integer number (11060932788).

Almost surely, 2^42400242331 is an apocalyptic number.

42400242331 is a deficient number, since it is larger than the sum of its proper divisors (1843488821).

42400242331 is a wasteful number, since it uses less digits than its factorization.

42400242331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843488820.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 42400242331 its reverse (13324200424), we get a palindrome (55724442755).

The spelling of 42400242331 in words is "forty-two billion, four hundred million, two hundred forty-two thousand, three hundred thirty-one".