1565225088 has 128 divisors (see below), whose sum is σ = 5031227520. Its totient is φ = 420888576.

The previous prime is 1565225063. The next prime is 1565225093. The reversal of 1565225088 is 8805225651.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×1565225088² = 4899859152209215488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28570 + ... + 62822.

It is an arithmetic number, because the mean of its divisors is an integer number (39306465).

Almost surely, 2^1565225088 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 1565225088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2515613760).

1565225088 is an abundant number, since it is smaller than the sum of its proper divisors (3466002432).

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

1565225088 is a wasteful number, since it uses less digits than its factorization.

1565225088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34294 (or 34282 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 42.

The square root of 1565225088 is about 39562.9256754351. The cubic root of 1565225088 is about 1161.0714159647.

The spelling of 1565225088 in words is "one billion, five hundred sixty-five million, two hundred twenty-five thousand, eighty-eight".