42561532331 has 8 divisors (see below), whose sum is σ = 44805683280. Its totient is φ = 40317788448.

The previous prime is 42561532313. The next prime is 42561532337. The reversal of 42561532331 is 13323516524.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42561532331 is a prime.

It is a super-2 number, since 2×42561532331² (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 = 42561532291 and 42561532300.

It is not an unprimeable number, because it can be changed into a prime (42561532337) 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, 125945 + ... + 317781.

It is an arithmetic number, because the mean of its divisors is an integer number (5600710410).

Almost surely, 2^42561532331 is an apocalyptic number.

42561532331 is a deficient number, since it is larger than the sum of its proper divisors (2244150949).

42561532331 is a wasteful number, since it uses less digits than its factorization.

42561532331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203533.

The product of its digits is 64800, while the sum is 35.

The spelling of 42561532331 in words is "forty-two billion, five hundred sixty-one million, five hundred thirty-two thousand, three hundred thirty-one".