31120442 has 8 divisors (see below), whose sum is σ = 49137600. Its totient is φ = 14741244.

The previous prime is 31120417. The next prime is 31120447. The reversal of 31120442 is 24402113.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31120442.

It is not an unprimeable number, because it can be changed into a prime (31120447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409442 + ... + 409517.

It is an arithmetic number, because the mean of its divisors is an integer number (6142200).

Almost surely, 2^31120442 is an apocalyptic number.

31120442 is a deficient number, since it is larger than the sum of its proper divisors (18017158).

31120442 is a wasteful number, since it uses less digits than its factorization.

31120442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818980.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31120442 is about 5578.5698884212. The cubic root of 31120442 is about 314.5443719341.

Adding to 31120442 its reverse (24402113), we get a palindrome (55522555).

The spelling of 31120442 in words is "thirty-one million, one hundred twenty thousand, four hundred forty-two".