31155214 has 8 divisors (see below), whose sum is σ = 46773720. Its totient is φ = 15563976.

The previous prime is 31155211. The next prime is 31155227. The reversal of 31155214 is 41255113.

It is a happy number.

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 (31155211) 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, 3669 + ... + 8704.

It is an arithmetic number, because the mean of its divisors is an integer number (5846715).

Almost surely, 2^31155214 is an apocalyptic number.

31155214 is a deficient number, since it is larger than the sum of its proper divisors (15618506).

31155214 is a wasteful number, since it uses less digits than its factorization.

31155214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13634.

The product of its digits is 600, while the sum is 22.

The square root of 31155214 is about 5581.6855877056. The cubic root of 31155214 is about 314.6614789455.

The spelling of 31155214 in words is "thirty-one million, one hundred fifty-five thousand, two hundred fourteen".