31120002 has 12 divisors (see below), whose sum is σ = 67426710. Its totient is φ = 10373328.

The previous prime is 31119983. The next prime is 31120009. The reversal of 31120002 is 20002113.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27468081 + 3651921 = 5241^2 + 1911^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (31120009) 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 5 ways as a sum of consecutive naturals, for example, 864427 + ... + 864462.

Almost surely, 2^31120002 is an apocalyptic number.

31120002 is an abundant number, since it is smaller than the sum of its proper divisors (36306708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31120002 is a wasteful number, since it uses less digits than its factorization.

31120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728897 (or 1728894 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 31120002 is about 5578.5304516512. The cubic root of 31120002 is about 314.5428895197.

Adding to 31120002 its reverse (20002113), we get a palindrome (51122115).

The spelling of 31120002 in words is "thirty-one million, one hundred twenty thousand, two".