312146431 has 2 divisors, whose sum is σ = 312146432. Its totient is φ = 312146430.

The previous prime is 312146423. The next prime is 312146479. The reversal of 312146431 is 134641213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312146431 - 2³ = 312146423 is a prime.

It is a super-2 number, since 2×312146431² = 194870788772075522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312146396 and 312146405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312146491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156073215 + 156073216.

It is an arithmetic number, because the mean of its divisors is an integer number (156073216).

Almost surely, 2^312146431 is an apocalyptic number.

312146431 is a deficient number, since it is larger than the sum of its proper divisors (1).

312146431 is an equidigital number, since it uses as much as digits as its factorization.

312146431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The square root of 312146431 is about 17667.6662578848. Note that the first 3 decimals coincide. The cubic root of 312146431 is about 678.3483785209.

Adding to 312146431 its reverse (134641213), we get a palindrome (446787644).

The spelling of 312146431 in words is "three hundred twelve million, one hundred forty-six thousand, four hundred thirty-one".