245520237 has 4 divisors (see below), whose sum is σ = 327360320. Its totient is φ = 163680156.

The previous prime is 245520203. The next prime is 245520241. The reversal of 245520237 is 732025542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 245520237 - 2²⁷ = 111302509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245540237) 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, 40920037 + ... + 40920042.

It is an arithmetic number, because the mean of its divisors is an integer number (81840080).

Almost surely, 2^245520237 is an apocalyptic number.

It is an amenable number.

245520237 is a deficient number, since it is larger than the sum of its proper divisors (81840083).

245520237 is an equidigital number, since it uses as much as digits as its factorization.

245520237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81840082.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 245520237 is about 15669.0853913048. The cubic root of 245520237 is about 626.1750583029.

Adding to 245520237 its reverse (732025542), we get a palindrome (977545779).

The spelling of 245520237 in words is "two hundred forty-five million, five hundred twenty thousand, two hundred thirty-seven".