31124550641 has 2 divisors, whose sum is σ = 31124550642. Its totient is φ = 31124550640.

The previous prime is 31124550619. The next prime is 31124550679. The reversal of 31124550641 is 14605542113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22862649616 + 8261901025 = 151204^2 + 90895^2 .

It is a cyclic number.

It is not a de Polignac number, because 31124550641 - 2²⁶ = 31057441777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31124550598 and 31124550607.

It is not a weakly prime, because it can be changed into another prime (31124550841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562275320 + 15562275321.

It is an arithmetic number, because the mean of its divisors is an integer number (15562275321).

Almost surely, 2^31124550641 is an apocalyptic number.

It is an amenable number.

31124550641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31124550641 is an equidigital number, since it uses as much as digits as its factorization.

31124550641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 31124550641 in words is "thirty-one billion, one hundred twenty-four million, five hundred fifty thousand, six hundred forty-one".