31003113 has 8 divisors (see below), whose sum is σ = 41663488. Its totient is φ = 20505744.

The previous prime is 31003109. The next prime is 31003139. The reversal of 31003113 is 31130013.

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

It is not a de Polignac number, because 31003113 - 2² = 31003109 is a prime.

It is a super-2 number, since 2×31003113² = 1922386031381538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31003163) 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, 40306 + ... + 41067.

It is an arithmetic number, because the mean of its divisors is an integer number (5207936).

Almost surely, 2^31003113 is an apocalyptic number.

It is an amenable number.

31003113 is a deficient number, since it is larger than the sum of its proper divisors (10660375).

31003113 is a wasteful number, since it uses less digits than its factorization.

31003113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81503.

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 31003113 is about 5568.0439114648. The cubic root of 31003113 is about 314.1485800678.

Adding to 31003113 its reverse (31130013), we get a palindrome (62133126).

The spelling of 31003113 in words is "thirty-one million, three thousand, one hundred thirteen".