31003402312 has 32 divisors (see below), whose sum is σ = 60075429120. Its totient is φ = 14984435520.

The previous prime is 31003402301. The next prime is 31003402319. The reversal of 31003402312 is 21320430013.

It is a super-2 number, since 2×31003402312² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31003402312.

It is not an unprimeable number, because it can be changed into a prime (31003402319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146223 + ... + 288769.

It is an arithmetic number, because the mean of its divisors is an integer number (1877357160).

Almost surely, 2^31003402312 is an apocalyptic number.

It is an amenable number.

31003402312 is a deficient number, since it is larger than the sum of its proper divisors (29072026808).

31003402312 is a wasteful number, since it uses less digits than its factorization.

31003402312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143461 (or 143457 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31003402312 its reverse (21320430013), we get a palindrome (52323832325).

The spelling of 31003402312 in words is "thirty-one billion, three million, four hundred two thousand, three hundred twelve".