312545161 has 2 divisors, whose sum is σ = 312545162. Its totient is φ = 312545160.

The previous prime is 312545143. The next prime is 312545201. The reversal of 312545161 is 161545213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 291897225 + 20647936 = 17085^2 + 4544^2 .

It is an emirp because it is prime and its reverse (161545213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312545161 - 2⁷ = 312545033 is a prime.

It is not a weakly prime, because it can be changed into another prime (312545111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156272580 + 156272581.

It is an arithmetic number, because the mean of its divisors is an integer number (156272581).

Almost surely, 2^312545161 is an apocalyptic number.

It is an amenable number.

312545161 is a deficient number, since it is larger than the sum of its proper divisors (1).

312545161 is an equidigital number, since it uses as much as digits as its factorization.

312545161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 28.

The square root of 312545161 is about 17678.9468294919. The cubic root of 312545161 is about 678.6370921245.

The spelling of 312545161 in words is "three hundred twelve million, five hundred forty-five thousand, one hundred sixty-one".