312211418 has 4 divisors (see below), whose sum is σ = 468317130. Its totient is φ = 156105708.

The previous prime is 312211391. The next prime is 312211441. The reversal of 312211418 is 814112213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 814112213 = 9431 ⋅86323.

It can be written as a sum of positive squares in only one way, i.e., 304048969 + 8162449 = 17437^2 + 2857^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312211393 and 312211402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78052853 + ... + 78052856.

Almost surely, 2^312211418 is an apocalyptic number.

312211418 is a deficient number, since it is larger than the sum of its proper divisors (156105712).

312211418 is a wasteful number, since it uses less digits than its factorization.

312211418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156105711.

The product of its digits is 384, while the sum is 23.

The square root of 312211418 is about 17669.5053128264. The cubic root of 312211418 is about 678.3954512649.

The spelling of 312211418 in words is "three hundred twelve million, two hundred eleven thousand, four hundred eighteen".