245131161 has 8 divisors (see below), whose sum is σ = 356554464. Its totient is φ = 148564320.

The previous prime is 245131157. The next prime is 245131181. The reversal of 245131161 is 161131542.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 245131161 - 2² = 245131157 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245131111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3714076 + ... + 3714141.

It is an arithmetic number, because the mean of its divisors is an integer number (44569308).

Almost surely, 2^245131161 is an apocalyptic number.

It is an amenable number.

245131161 is a deficient number, since it is larger than the sum of its proper divisors (111423303).

245131161 is a wasteful number, since it uses less digits than its factorization.

245131161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428231.

The product of its digits is 720, while the sum is 24.

The square root of 245131161 is about 15656.6650663543. The cubic root of 245131161 is about 625.8441168203.

The spelling of 245131161 in words is "two hundred forty-five million, one hundred thirty-one thousand, one hundred sixty-one".