312240427 has 2 divisors, whose sum is σ = 312240428. Its totient is φ = 312240426.

The previous prime is 312240347. The next prime is 312240473. The reversal of 312240427 is 724042213.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312240427 - 2¹⁵ = 312207659 is a prime.

It is not a weakly prime, because it can be changed into another prime (312240527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156120213 + 156120214.

It is an arithmetic number, because the mean of its divisors is an integer number (156120214).

Almost surely, 2^312240427 is an apocalyptic number.

312240427 is a deficient number, since it is larger than the sum of its proper divisors (1).

312240427 is an equidigital number, since it uses as much as digits as its factorization.

312240427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 312240427 is about 17670.3261712963. The cubic root of 312240427 is about 678.4164615622.

The spelling of 312240427 in words is "three hundred twelve million, two hundred forty thousand, four hundred twenty-seven".