312203145 has 16 divisors (see below), whose sum is σ = 500852160. Its totient is φ = 166065984.

The previous prime is 312203137. The next prime is 312203159. The reversal of 312203145 is 541302213.

It is not a de Polignac number, because 312203145 - 2³ = 312203137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21774 + ... + 33143.

It is an arithmetic number, because the mean of its divisors is an integer number (31303260).

Almost surely, 2^312203145 is an apocalyptic number.

It is an amenable number.

312203145 is a deficient number, since it is larger than the sum of its proper divisors (188649015).

312203145 is a wasteful number, since it uses less digits than its factorization.

312203145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55304.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 312203145 is about 17669.2712073815. The cubic root of 312203145 is about 678.3894591553.

Adding to 312203145 its reverse (541302213), we get a palindrome (853505358).

The spelling of 312203145 in words is "three hundred twelve million, two hundred three thousand, one hundred forty-five".