3132717821 has 2 divisors, whose sum is σ = 3132717822. Its totient is φ = 3132717820.

The previous prime is 3132717811. The next prime is 3132717851. The reversal of 3132717821 is 1287172313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3046488025 + 86229796 = 55195^2 + 9286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3132717821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3132717811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1566358910 + 1566358911.

It is an arithmetic number, because the mean of its divisors is an integer number (1566358911).

Almost surely, 2^3132717821 is an apocalyptic number.

It is an amenable number.

3132717821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3132717821 is an equidigital number, since it uses as much as digits as its factorization.

3132717821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 35.

The square root of 3132717821 is about 55970.6871585476. The cubic root of 3132717821 is about 1463.2114553991.

The spelling of 3132717821 in words is "three billion, one hundred thirty-two million, seven hundred seventeen thousand, eight hundred twenty-one".