1565213040 has 60 divisors (see below), whose sum is σ = 5256509544. Its totient is φ = 417389952.

The previous prime is 1565212949. The next prime is 1565213047. The reversal of 1565213040 is 403125651.

1565213040 is a `hidden beast` number, since 1 + 5 + 652 + 1 + 3 + 0 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a junction number, because it is equal to n+sod(n) for n = 1565212995 and 1565213013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1565213047) 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, 1086234 + ... + 1087673.

Almost surely, 2^1565213040 is an apocalyptic number.

1565213040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1565213040 is an abundant number, since it is smaller than the sum of its proper divisors (3691296504).

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

1565213040 is a wasteful number, since it uses less digits than its factorization.

1565213040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173926 (or 2173917 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1565213040 is about 39562.7734113775. The cubic root of 1565213040 is about 1161.0684369204.

Adding to 1565213040 its reverse (403125651), we get a palindrome (1968338691).

The spelling of 1565213040 in words is "one billion, five hundred sixty-five million, two hundred thirteen thousand, forty".