306212138651 has 2 divisors, whose sum is σ = 306212138652. Its totient is φ = 306212138650.

The previous prime is 306212138647. The next prime is 306212138671. The reversal of 306212138651 is 156831212603.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 306212138651 - 2² = 306212138647 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (306212138611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153106069325 + 153106069326.

It is an arithmetic number, because the mean of its divisors is an integer number (153106069326).

Almost surely, 2^306212138651 is an apocalyptic number.

306212138651 is a deficient number, since it is larger than the sum of its proper divisors (1).

306212138651 is an equidigital number, since it uses as much as digits as its factorization.

306212138651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 306212138651 in words is "three hundred six billion, two hundred twelve million, one hundred thirty-eight thousand, six hundred fifty-one".