245505131 has 4 divisors (see below), whose sum is σ = 245553792. Its totient is φ = 245456472.

The previous prime is 245505121. The next prime is 245505163. The reversal of 245505131 is 131505542.

245505131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245505131 is a prime.

It is a super-2 number, since 2×245505131² = 120545538694654322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245505131.

It is not an unprimeable number, because it can be changed into a prime (245505121) 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, 15755 + ... + 27188.

It is an arithmetic number, because the mean of its divisors is an integer number (61388448).

Almost surely, 2^245505131 is an apocalyptic number.

245505131 is a deficient number, since it is larger than the sum of its proper divisors (48661).

245505131 is an equidigital number, since it uses as much as digits as its factorization.

245505131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48660.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 245505131 is about 15668.6033519264. The cubic root of 245505131 is about 626.1622159204.

The spelling of 245505131 in words is "two hundred forty-five million, five hundred five thousand, one hundred thirty-one".