31012432403 has 2 divisors, whose sum is σ = 31012432404. Its totient is φ = 31012432402.

The previous prime is 31012432343. The next prime is 31012432411. The reversal of 31012432403 is 30423421013.

It is a strong prime.

It is an emirp because it is prime and its reverse (30423421013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31012432403 - 2²² = 31008238099 is a prime.

It is not a weakly prime, because it can be changed into another prime (31012432603) 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 as a sum of consecutive naturals, namely, 15506216201 + 15506216202.

It is an arithmetic number, because the mean of its divisors is an integer number (15506216202).

Almost surely, 2^31012432403 is an apocalyptic number.

31012432403 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012432403 is an equidigital number, since it uses as much as digits as its factorization.

31012432403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31012432403 its reverse (30423421013), we get a palindrome (61435853416).

The spelling of 31012432403 in words is "thirty-one billion, twelve million, four hundred thirty-two thousand, four hundred three".