245320161 has 16 divisors (see below), whose sum is σ = 330255744. Its totient is φ = 161973504.

The previous prime is 245320157. The next prime is 245320211. The reversal of 245320161 is 161023542.

It is not a de Polignac number, because 245320161 - 2² = 245320157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245320111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168111 + ... + 169563.

It is an arithmetic number, because the mean of its divisors is an integer number (20640984).

Almost surely, 2^245320161 is an apocalyptic number.

It is an amenable number.

245320161 is a deficient number, since it is larger than the sum of its proper divisors (84935583).

245320161 is a wasteful number, since it uses less digits than its factorization.

245320161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 245320161 is about 15662.6996715126. The cubic root of 245320161 is about 626.0049207356.

The spelling of 245320161 in words is "two hundred forty-five million, three hundred twenty thousand, one hundred sixty-one".