1565255424 has 72 divisors (see below), whose sum is σ = 4181263632. Its totient is φ = 519823360.

The previous prime is 1565255411. The next prime is 1565255491. The reversal of 1565255424 is 4245525651.

It is a super-2 number, since 2×1565255424² = 4900049084722839552, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212182 + ... + 219434.

It is an arithmetic number, because the mean of its divisors is an integer number (58073106).

Almost surely, 2^1565255424 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 1565255424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2090631816).

1565255424 is an abundant number, since it is smaller than the sum of its proper divisors (2616008208).

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

1565255424 is an equidigital number, since it uses as much as digits as its factorization.

1565255424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7553 (or 7539 counting only the distinct ones).

The product of its digits is 240000, while the sum is 39.

The square root of 1565255424 is about 39563.3090628173. The cubic root of 1565255424 is about 1161.0789169167.

The spelling of 1565255424 in words is "one billion, five hundred sixty-five million, two hundred fifty-five thousand, four hundred twenty-four".