312432247 has 4 divisors (see below), whose sum is σ = 315653296. Its totient is φ = 309211200.

The previous prime is 312432233. The next prime is 312432271. The reversal of 312432247 is 742234213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312432247 - 2⁷ = 312432119 is a prime.

It is a super-2 number, since 2×312432247² = 195227817930938018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312432217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610379 + ... + 1610572.

It is an arithmetic number, because the mean of its divisors is an integer number (78913324).

Almost surely, 2^312432247 is an apocalyptic number.

312432247 is a deficient number, since it is larger than the sum of its proper divisors (3221049).

312432247 is an equidigital number, since it uses as much as digits as its factorization.

312432247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221048.

The product of its digits is 8064, while the sum is 28.

The square root of 312432247 is about 17675.7530815521. The cubic root of 312432247 is about 678.5553579542. Note that the first 3 decimals are identical.

The spelling of 312432247 in words is "three hundred twelve million, four hundred thirty-two thousand, two hundred forty-seven".