31402012 has 24 divisors (see below), whose sum is σ = 57224160. Its totient is φ = 15059520.

The previous prime is 31401991. The next prime is 31402013. The reversal of 31402012 is 21020413.

It is a junction number, because it is equal to n+sod(n) for n = 31401983 and 31402001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402013) 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 7 ways as a sum of consecutive naturals, for example, 18562 + ... + 20182.

It is an arithmetic number, because the mean of its divisors is an integer number (2384340).

Almost surely, 2^31402012 is an apocalyptic number.

It is an amenable number.

31402012 is a deficient number, since it is larger than the sum of its proper divisors (25822148).

31402012 is a wasteful number, since it uses less digits than its factorization.

31402012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821 (or 1819 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 31402012 is about 5603.7498159714. The cubic root of 31402012 is about 315.4901648946.

Adding to 31402012 its reverse (21020413), we get a palindrome (52422425).

The spelling of 31402012 in words is "thirty-one million, four hundred two thousand, twelve".