245220136 has 32 divisors (see below), whose sum is σ = 529323840. Its totient is φ = 104323968.

The previous prime is 245220133. The next prime is 245220149. The reversal of 245220136 is 631022542.

245220136 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 245220136.

It is not an unprimeable number, because it can be changed into a prime (245220133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8310 + ... + 23653.

It is an arithmetic number, because the mean of its divisors is an integer number (16541370).

Almost surely, 2^245220136 is an apocalyptic number.

It is an amenable number.

245220136 is an abundant number, since it is smaller than the sum of its proper divisors (284103704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245220136 is a wasteful number, since it uses less digits than its factorization.

245220136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32113 (or 32109 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 245220136 is about 15659.5062501983. The cubic root of 245220136 is about 625.9198283213.

Adding to 245220136 its reverse (631022542), we get a palindrome (876242678).

The spelling of 245220136 in words is "two hundred forty-five million, two hundred twenty thousand, one hundred thirty-six".