39731242431 has 8 divisors (see below), whose sum is σ = 54406746544. Its totient is φ = 25771616640.

The previous prime is 39731242427. The next prime is 39731242433. The reversal of 39731242431 is 13424213793.

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

It is not a de Polignac number, because 39731242431 - 2² = 39731242427 is a prime.

It is a super-2 number, since 2×39731242431² (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 39731242431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39731242433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178969450 + ... + 178969671.

It is an arithmetic number, because the mean of its divisors is an integer number (6800843318).

Almost surely, 2^39731242431 is an apocalyptic number.

39731242431 is a deficient number, since it is larger than the sum of its proper divisors (14675504113).

39731242431 is a wasteful number, since it uses less digits than its factorization.

39731242431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357939161.

The product of its digits is 108864, while the sum is 39.

The spelling of 39731242431 in words is "thirty-nine billion, seven hundred thirty-one million, two hundred forty-two thousand, four hundred thirty-one".