245105520 has 160 divisors (see below), whose sum is σ = 834589440. Its totient is φ = 59013120.

The previous prime is 245105513. The next prime is 245105521. The reversal of 245105520 is 25501542.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245105521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 599076 + ... + 599484.

It is an arithmetic number, because the mean of its divisors is an integer number (5216184).

Almost surely, 2^245105520 is an apocalyptic number.

245105520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245105520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417294720).

245105520 is an abundant number, since it is smaller than the sum of its proper divisors (589483920).

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

245105520 is a wasteful number, since it uses less digits than its factorization.

245105520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 245105520 is about 15655.8461923973. The cubic root of 245105520 is about 625.8222947224.

The spelling of 245105520 in words is "two hundred forty-five million, one hundred five thousand, five hundred twenty".