251153242297 has 2 divisors, whose sum is σ = 251153242298. Its totient is φ = 251153242296.

The previous prime is 251153242289. The next prime is 251153242321. The reversal of 251153242297 is 792242351152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176785770681 + 74367471616 = 420459^2 + 272704^2 .

It is a cyclic number.

It is not a de Polignac number, because 251153242297 - 2³ = 251153242289 is a prime.

It is a super-2 number, since 2×251153242297² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (251153242217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125576621148 + 125576621149.

It is an arithmetic number, because the mean of its divisors is an integer number (125576621149).

Almost surely, 2^251153242297 is an apocalyptic number.

It is an amenable number.

251153242297 is a deficient number, since it is larger than the sum of its proper divisors (1).

251153242297 is an equidigital number, since it uses as much as digits as its factorization.

251153242297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The spelling of 251153242297 in words is "two hundred fifty-one billion, one hundred fifty-three million, two hundred forty-two thousand, two hundred ninety-seven".