245523036251 has 4 divisors (see below), whose sum is σ = 247953957504. Its totient is φ = 243092115000.

The previous prime is 245523036211. The next prime is 245523036257. The reversal of 245523036251 is 152630325542.

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-245523036251 is a prime.

It is a super-2 number, since 2×245523036251² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245523036257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215460475 + ... + 1215460676.

It is an arithmetic number, because the mean of its divisors is an integer number (61988489376).

Almost surely, 2^245523036251 is an apocalyptic number.

245523036251 is a deficient number, since it is larger than the sum of its proper divisors (2430921253).

245523036251 is a wasteful number, since it uses less digits than its factorization.

245523036251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430921252.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 245523036251 in words is "two hundred forty-five billion, five hundred twenty-three million, thirty-six thousand, two hundred fifty-one".