31871428903 has 4 divisors (see below), whose sum is σ = 32612624968. Its totient is φ = 31130232840.

The previous prime is 31871428873. The next prime is 31871428907. The reversal of 31871428903 is 30982417813.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31871428903 - 2⁵ = 31871428871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31871428907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370597968 + ... + 370598053.

It is an arithmetic number, because the mean of its divisors is an integer number (8153156242).

Almost surely, 2^31871428903 is an apocalyptic number.

31871428903 is a deficient number, since it is larger than the sum of its proper divisors (741196065).

31871428903 is an equidigital number, since it uses as much as digits as its factorization.

31871428903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741196064.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 31871428903 in words is "thirty-one billion, eight hundred seventy-one million, four hundred twenty-eight thousand, nine hundred three".