312653645021 has 2 divisors, whose sum is σ = 312653645022. Its totient is φ = 312653645020.

The previous prime is 312653644999. The next prime is 312653645041. The reversal of 312653645021 is 120546356213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258882528025 + 53771116996 = 508805^2 + 231886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312653645021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312653645041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156326822510 + 156326822511.

It is an arithmetic number, because the mean of its divisors is an integer number (156326822511).

Almost surely, 2^312653645021 is an apocalyptic number.

It is an amenable number.

312653645021 is a deficient number, since it is larger than the sum of its proper divisors (1).

312653645021 is an equidigital number, since it uses as much as digits as its factorization.

312653645021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 312653645021 in words is "three hundred twelve billion, six hundred fifty-three million, six hundred forty-five thousand, twenty-one".