1565225136 has 60 divisors (see below), whose sum is σ = 4403468160. Its totient is φ = 519000960.

The previous prime is 1565225131. The next prime is 1565225227. The reversal of 1565225136 is 6315225651.

1565225136 is a `hidden beast` number, since 1 + 56 + 522 + 51 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1565225136.

It is not an unprimeable number, because it can be changed into a prime (1565225131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 951 + ... + 55958.

It is an arithmetic number, because the mean of its divisors is an integer number (73391136).

Almost surely, 2^1565225136 is an apocalyptic number.

1565225136 is a gapful number since it is divisible by the number (16) 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 1565225136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2201734080).

1565225136 is an abundant number, since it is smaller than the sum of its proper divisors (2838243024).

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

1565225136 is a wasteful number, since it uses less digits than its factorization.

1565225136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57114 (or 57105 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 1565225136 is about 39562.9262820636. The cubic root of 1565225136 is about 1161.0714278333.

The spelling of 1565225136 in words is "one billion, five hundred sixty-five million, two hundred twenty-five thousand, one hundred thirty-six".