312421511 has 2 divisors, whose sum is σ = 312421512. Its totient is φ = 312421510.

The previous prime is 312421453. The next prime is 312421519. The reversal of 312421511 is 115124213.

It is a strong prime.

It is an emirp because it is prime and its reverse (115124213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312421511 - 2²² = 308227207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312421519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156210755 + 156210756.

It is an arithmetic number, because the mean of its divisors is an integer number (156210756).

Almost surely, 2^312421511 is an apocalyptic number.

312421511 is a deficient number, since it is larger than the sum of its proper divisors (1).

312421511 is an equidigital number, since it uses as much as digits as its factorization.

312421511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 20.

The square root of 312421511 is about 17675.4493860835. The cubic root of 312421511 is about 678.5475855450.

Adding to 312421511 its reverse (115124213), we get a palindrome (427545724).

The spelling of 312421511 in words is "three hundred twelve million, four hundred twenty-one thousand, five hundred eleven".