31304542 has 4 divisors (see below), whose sum is σ = 46956816. Its totient is φ = 15652270.

The previous prime is 31304527. The next prime is 31304549. The reversal of 31304542 is 24540313.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31304549) 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 as a sum of consecutive naturals, namely, 7826134 + ... + 7826137.

It is an arithmetic number, because the mean of its divisors is an integer number (11739204).

Almost surely, 2^31304542 is an apocalyptic number.

31304542 is a deficient number, since it is larger than the sum of its proper divisors (15652274).

31304542 is a wasteful number, since it uses less digits than its factorization.

31304542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15652273.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 31304542 is about 5595.0462017753. The cubic root of 31304542 is about 315.1634056028.

Adding to 31304542 its reverse (24540313), we get a palindrome (55844855).

The spelling of 31304542 in words is "thirty-one million, three hundred four thousand, five hundred forty-two".