2265637520 has 80 divisors (see below), whose sum is σ = 5562560640. Its totient is φ = 855816192.

The previous prime is 2265637513. The next prime is 2265637559. The reversal of 2265637520 is 257365622.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×2265637520² = 10266226744063500800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510029 + ... + 514451.

It is an arithmetic number, because the mean of its divisors is an integer number (69532008).

Almost surely, 2^2265637520 is an apocalyptic number.

2265637520 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 2265637520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2781280320).

2265637520 is an abundant number, since it is smaller than the sum of its proper divisors (3296923120).

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

2265637520 is a wasteful number, since it uses less digits than its factorization.

2265637520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792 (or 4786 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 38.

The square root of 2265637520 is about 47598.7134279909. The cubic root of 2265637520 is about 1313.3993874262.

The spelling of 2265637520 in words is "two billion, two hundred sixty-five million, six hundred thirty-seven thousand, five hundred twenty".