42311443202561 has 8 divisors (see below), whose sum is σ = 45566224331880. Its totient is φ = 39056669891712.

The previous prime is 42311443202533. The next prime is 42311443202603. The reversal of 42311443202561 is 16520234411324.

It can be written as a sum of positive squares in 4 ways, for example, as 17960020225 + 42293483182336 = 134015^2 + 6503344^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42311443202561 - 2²² = 42311439008257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42311443202461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14278181 + ... + 16984973.

It is an arithmetic number, because the mean of its divisors is an integer number (5695778041485).

Almost surely, 2^{42311443202561} is an apocalyptic number.

It is an amenable number.

42311443202561 is a deficient number, since it is larger than the sum of its proper divisors (3254781129319).

42311443202561 is a wasteful number, since it uses less digits than its factorization.

42311443202561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3909235.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 42311443202561 its reverse (16520234411324), we get a palindrome (58831677613885).

The spelling of 42311443202561 in words is "forty-two trillion, three hundred eleven billion, four hundred forty-three million, two hundred two thousand, five hundred sixty-one".