312481306 has 4 divisors (see below), whose sum is σ = 468721962. Its totient is φ = 156240652.

The previous prime is 312481291. The next prime is 312481307. The reversal of 312481306 is 603184213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 603184213 = 10163 ⋅59351.

It can be written as a sum of positive squares in only one way, i.e., 250937281 + 61544025 = 15841^2 + 7845^2 .

It is not an unprimeable number, because it can be changed into a prime (312481307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78120325 + ... + 78120328.

Almost surely, 2^312481306 is an apocalyptic number.

312481306 is a deficient number, since it is larger than the sum of its proper divisors (156240656).

312481306 is a wasteful number, since it uses less digits than its factorization.

312481306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156240655.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 312481306 is about 17677.1407755892. The cubic root of 312481306 is about 678.5908723261.

The spelling of 312481306 in words is "three hundred twelve million, four hundred eighty-one thousand, three hundred six".