245015136 has 144 divisors (see below), whose sum is σ = 743468544. Its totient is φ = 76361472.

The previous prime is 245015129. The next prime is 245015143. The reversal of 245015136 is 631510542.

245015136 is a `hidden beast` number, since 24 + 501 + 5 + 136 = 666.

It is an interprime number because it is at equal distance from previous prime (245015129) and next prime (245015143).

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310935 + ... + 311721.

It is an arithmetic number, because the mean of its divisors is an integer number (5162976).

Almost surely, 2^245015136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245015136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371734272).

245015136 is an abundant number, since it is smaller than the sum of its proper divisors (498453408).

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

245015136 is a wasteful number, since it uses less digits than its factorization.

245015136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 245015136 is about 15652.9593368155. The cubic root of 245015136 is about 625.7453601345.

Adding to 245015136 its reverse (631510542), we get a palindrome (876525678).

The spelling of 245015136 in words is "two hundred forty-five million, fifteen thousand, one hundred thirty-six".