31323000542 has 4 divisors (see below), whose sum is σ = 46984500816. Its totient is φ = 15661500270.

The previous prime is 31323000517. The next prime is 31323000559. The reversal of 31323000542 is 24500032313.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×31323000542² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7830750134 + ... + 7830750137.

It is an arithmetic number, because the mean of its divisors is an integer number (11746125204).

Almost surely, 2^31323000542 is an apocalyptic number.

31323000542 is a deficient number, since it is larger than the sum of its proper divisors (15661500274).

31323000542 is a wasteful number, since it uses less digits than its factorization.

31323000542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15661500273.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 31323000542 its reverse (24500032313), we get a palindrome (55823032855).

The spelling of 31323000542 in words is "thirty-one billion, three hundred twenty-three million, five hundred forty-two", and thus it is an aban number.