3112573721 has 4 divisors (see below), whose sum is σ = 3133186944. Its totient is φ = 3091960500.

The previous prime is 3112573687. The next prime is 3112573727. The reversal of 3112573721 is 1273752113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1273752113 = 83 ⋅15346411.

It is a cyclic number.

It is not a de Polignac number, because 3112573721 - 2⁶ = 3112573657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3112573727) 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, 10306385 + ... + 10306686.

It is an arithmetic number, because the mean of its divisors is an integer number (783296736).

Almost surely, 2^3112573721 is an apocalyptic number.

It is an amenable number.

3112573721 is a deficient number, since it is larger than the sum of its proper divisors (20613223).

3112573721 is a wasteful number, since it uses less digits than its factorization.

3112573721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20613222.

The product of its digits is 8820, while the sum is 32.

The square root of 3112573721 is about 55790.4447105416. Note that the first 3 decimals coincide. The cubic root of 3112573721 is about 1460.0684463126.

The spelling of 3112573721 in words is "three billion, one hundred twelve million, five hundred seventy-three thousand, seven hundred twenty-one".