249275307157 has 2 divisors, whose sum is σ = 249275307158. Its totient is φ = 249275307156.

The previous prime is 249275307143. The next prime is 249275307173. The reversal of 249275307157 is 751703572942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247293365796 + 1981941361 = 497286^2 + 44519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249275307157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249275307187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124637653578 + 124637653579.

It is an arithmetic number, because the mean of its divisors is an integer number (124637653579).

Almost surely, 2^249275307157 is an apocalyptic number.

It is an amenable number.

249275307157 is a deficient number, since it is larger than the sum of its proper divisors (1).

249275307157 is an equidigital number, since it uses as much as digits as its factorization.

249275307157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3704400, while the sum is 52.

The spelling of 249275307157 in words is "two hundred forty-nine billion, two hundred seventy-five million, three hundred seven thousand, one hundred fifty-seven".