31040542 has 8 divisors (see below), whose sum is σ = 50142456. Its totient is φ = 14326392.

The previous prime is 31040533. The next prime is 31040543. The reversal of 31040542 is 24504013.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31040543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596908 + ... + 596959.

It is an arithmetic number, because the mean of its divisors is an integer number (6267807).

Almost surely, 2^31040542 is an apocalyptic number.

31040542 is a deficient number, since it is larger than the sum of its proper divisors (19101914).

31040542 is a wasteful number, since it uses less digits than its factorization.

31040542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193882.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 31040542 is about 5571.4039523266. The cubic root of 31040542 is about 314.2749495132.

Adding to 31040542 its reverse (24504013), we get a palindrome (55544555).

The spelling of 31040542 in words is "thirty-one million, forty thousand, five hundred forty-two".