31042855 has 8 divisors (see below), whose sum is σ = 37620864. Its totient is φ = 24588000.

The previous prime is 31042853. The next prime is 31042871. The reversal of 31042855 is 55824013.

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

It is not a de Polignac number, because 31042855 - 2¹ = 31042853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31042853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30231 + ... + 31240.

It is an arithmetic number, because the mean of its divisors is an integer number (4702608).

Almost surely, 2^31042855 is an apocalyptic number.

31042855 is a deficient number, since it is larger than the sum of its proper divisors (6578009).

31042855 is a wasteful number, since it uses less digits than its factorization.

31042855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61577.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 31042855 is about 5571.6115263001. The cubic root of 31042855 is about 314.2827554326.

Adding to 31042855 its reverse (55824013), we get a palindrome (86866868).

The spelling of 31042855 in words is "thirty-one million, forty-two thousand, eight hundred fifty-five".