245188231 has 4 divisors (see below), whose sum is σ = 246656592. Its totient is φ = 243719872.

The previous prime is 245188187. The next prime is 245188259. The reversal of 245188231 is 132881542.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132881542 = 2 ⋅66440771.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245188231 is a prime.

It is a super-2 number, since 2×245188231² = 120234537241818722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245188261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733930 + ... + 734263.

It is an arithmetic number, because the mean of its divisors is an integer number (61664148).

Almost surely, 2^245188231 is an apocalyptic number.

245188231 is a deficient number, since it is larger than the sum of its proper divisors (1468361).

245188231 is a wasteful number, since it uses less digits than its factorization.

245188231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468360.

The product of its digits is 15360, while the sum is 34.

The square root of 245188231 is about 15658.4875067805. The cubic root of 245188231 is about 625.8926815045.

The spelling of 245188231 in words is "two hundred forty-five million, one hundred eighty-eight thousand, two hundred thirty-one".