31140403 has 16 divisors (see below), whose sum is σ = 37128960. Its totient is φ = 25552800.

The previous prime is 31140401. The next prime is 31140407. The reversal of 31140403 is 30404113.

It is not a de Polignac number, because 31140403 - 2¹ = 31140401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31140401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26008 + ... + 27178.

It is an arithmetic number, because the mean of its divisors is an integer number (2320560).

Almost surely, 2^31140403 is an apocalyptic number.

31140403 is a deficient number, since it is larger than the sum of its proper divisors (5988557).

31140403 is a wasteful number, since it uses less digits than its factorization.

31140403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31140403 is about 5580.3586802284. The cubic root of 31140403 is about 314.6116083216.

Adding to 31140403 its reverse (30404113), we get a palindrome (61544516).

The spelling of 31140403 in words is "thirty-one million, one hundred forty thousand, four hundred three".