31132403 has 2 divisors, whose sum is σ = 31132404. Its totient is φ = 31132402.

The previous prime is 31132391. The next prime is 31132433. The reversal of 31132403 is 30423113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31132403 - 2¹⁰ = 31131379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31132433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566201 + 15566202.

It is an arithmetic number, because the mean of its divisors is an integer number (15566202).

Almost surely, 2^31132403 is an apocalyptic number.

31132403 is a deficient number, since it is larger than the sum of its proper divisors (1).

31132403 is an equidigital number, since it uses as much as digits as its factorization.

31132403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 31132403 is about 5579.6418343833. The cubic root of 31132403 is about 314.5846646709.

Adding to 31132403 its reverse (30423113), we get a palindrome (61555516).

The spelling of 31132403 in words is "thirty-one million, one hundred thirty-two thousand, four hundred three".