31724152842 has 8 divisors (see below), whose sum is σ = 63448305696. Its totient is φ = 10574717612.

The previous prime is 31724152841. The next prime is 31724152879. The reversal of 31724152842 is 24825142713.

It is a happy number.

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

31724152842 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 31724152842.

It is not an unprimeable number, because it can be changed into a prime (31724152841) 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, 2643679398 + ... + 2643679409.

It is an arithmetic number, because the mean of its divisors is an integer number (7931038212).

Almost surely, 2^31724152842 is an apocalyptic number.

31724152842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31724152842 is a wasteful number, since it uses less digits than its factorization.

31724152842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287358812.

The product of its digits is 107520, while the sum is 39.

The spelling of 31724152842 in words is "thirty-one billion, seven hundred twenty-four million, one hundred fifty-two thousand, eight hundred forty-two".