31120141 has 4 divisors (see below), whose sum is σ = 33514012. Its totient is φ = 28726272.

The previous prime is 31120121. The next prime is 31120153. The reversal of 31120141 is 14102113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3515625 + 27604516 = 1875^2 + 5254^2 .

It is a cyclic number.

It is not a de Polignac number, because 31120141 - 2⁵ = 31120109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 2393857 = 31120141 / (3 + 1 + 1 + 2 + 0 + 1 + 4 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120121) 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, 1196916 + ... + 1196941.

It is an arithmetic number, because the mean of its divisors is an integer number (8378503).

Almost surely, 2^31120141 is an apocalyptic number.

It is an amenable number.

31120141 is a deficient number, since it is larger than the sum of its proper divisors (2393871).

31120141 is a wasteful number, since it uses less digits than its factorization.

31120141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393870.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 31120141 is about 5578.5429101155. The cubic root of 31120141 is about 314.5433578294.

Adding to 31120141 its reverse (14102113), we get a palindrome (45222254).

The spelling of 31120141 in words is "thirty-one million, one hundred twenty thousand, one hundred forty-one".