31226973073 has 4 divisors (see below), whose sum is σ = 33063853860. Its totient is φ = 29390092288.

The previous prime is 31226973067. The next prime is 31226973079. The reversal of 31226973073 is 37037962213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37037962213 = 7 ⋅5291137459.

It is an interprime number because it is at equal distance from previous prime (31226973067) and next prime (31226973079).

It can be written as a sum of positive squares in 2 ways, for example, as 21870860544 + 9356112529 = 147888^2 + 96727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31226973073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31226973079) 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 in 3 ways as a sum of consecutive naturals, for example, 918440368 + ... + 918440401.

It is an arithmetic number, because the mean of its divisors is an integer number (8265963465).

Almost surely, 2^31226973073 is an apocalyptic number.

It is an amenable number.

31226973073 is a deficient number, since it is larger than the sum of its proper divisors (1836880787).

31226973073 is a wasteful number, since it uses less digits than its factorization.

31226973073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836880786.

The product of its (nonzero) digits is 285768, while the sum is 43.

The spelling of 31226973073 in words is "thirty-one billion, two hundred twenty-six million, nine hundred seventy-three thousand, seventy-three".