31422403 has 2 divisors, whose sum is σ = 31422404. Its totient is φ = 31422402.

The previous prime is 31422401. The next prime is 31422463. The reversal of 31422403 is 30422413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31422403 - 2¹ = 31422401 is a prime.

Together with 31422401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31422401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711201 + 15711202.

It is an arithmetic number, because the mean of its divisors is an integer number (15711202).

Almost surely, 2^31422403 is an apocalyptic number.

31422403 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422403 is an equidigital number, since it uses as much as digits as its factorization.

31422403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 31422403 is about 5605.5689274150. The cubic root of 31422403 is about 315.5584383117.

Adding to 31422403 its reverse (30422413), we get a palindrome (61844816).

The spelling of 31422403 in words is "thirty-one million, four hundred twenty-two thousand, four hundred three".