31103140973 has 2 divisors, whose sum is σ = 31103140974. Its totient is φ = 31103140972.

The previous prime is 31103140969. The next prime is 31103141033. The reversal of 31103140973 is 37904130113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28540047844 + 2563093129 = 168938^2 + 50627^2 .

It is a cyclic number.

It is not a de Polignac number, because 31103140973 - 2² = 31103140969 is a prime.

It is a super-2 number, since 2×31103140973² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31103140903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551570486 + 15551570487.

It is an arithmetic number, because the mean of its divisors is an integer number (15551570487).

Almost surely, 2^31103140973 is an apocalyptic number.

It is an amenable number.

31103140973 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103140973 is an equidigital number, since it uses as much as digits as its factorization.

31103140973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The spelling of 31103140973 in words is "thirty-one billion, one hundred three million, one hundred forty thousand, nine hundred seventy-three".