245140251 has 16 divisors (see below), whose sum is σ = 332325504. Its totient is φ = 160709504.

The previous prime is 245140249. The next prime is 245140303. The reversal of 245140251 is 152041542.

It is a cyclic number.

It is not a de Polignac number, because 245140251 - 2¹ = 245140249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245140201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54355 + ... + 58691.

It is an arithmetic number, because the mean of its divisors is an integer number (20770344).

Almost surely, 2^245140251 is an apocalyptic number.

245140251 is a deficient number, since it is larger than the sum of its proper divisors (87185253).

245140251 is a wasteful number, since it uses less digits than its factorization.

245140251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 245140251 is about 15656.9553553684. The cubic root of 245140251 is about 625.8518526146.

Adding to 245140251 its reverse (152041542), we get a palindrome (397181793).

The spelling of 245140251 in words is "two hundred forty-five million, one hundred forty thousand, two hundred fifty-one".