312775505 has 16 divisors (see below), whose sum is σ = 447600384. Its totient is φ = 205149120.

The previous prime is 312775453. The next prime is 312775513. The reversal of 312775505 is 505577213.

It is not a de Polignac number, because 312775505 - 2¹⁰ = 312774481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

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, 193466 + ... + 195075.

It is an arithmetic number, because the mean of its divisors is an integer number (27975024).

Almost surely, 2^312775505 is an apocalyptic number.

312775505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

312775505 is a deficient number, since it is larger than the sum of its proper divisors (134824879).

312775505 is a wasteful number, since it uses less digits than its factorization.

312775505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388576.

The product of its (nonzero) digits is 36750, while the sum is 35.

The square root of 312775505 is about 17685.4602710814. The cubic root of 312775505 is about 678.8037684061.

The spelling of 312775505 in words is "three hundred twelve million, seven hundred seventy-five thousand, five hundred five".