306151421 has 2 divisors, whose sum is σ = 306151422. Its totient is φ = 306151420.

The previous prime is 306151411. The next prime is 306151423. The reversal of 306151421 is 124151603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158407396 + 147744025 = 12586^2 + 12155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-306151421 is a prime.

Together with 306151423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306151423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153075710 + 153075711.

It is an arithmetic number, because the mean of its divisors is an integer number (153075711).

Almost surely, 2^306151421 is an apocalyptic number.

It is an amenable number.

306151421 is a deficient number, since it is larger than the sum of its proper divisors (1).

306151421 is an equidigital number, since it uses as much as digits as its factorization.

306151421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 306151421 is about 17497.1832304517. The cubic root of 306151421 is about 673.9775437402.

The spelling of 306151421 in words is "three hundred six million, one hundred fifty-one thousand, four hundred twenty-one".