56135540 has 24 divisors (see below), whose sum is σ = 119502600. Its totient is φ = 22146048.

The previous prime is 56135537. The next prime is 56135543. The reversal of 56135540 is 4553165.

It is an interprime number because it is at equal distance from previous prime (56135537) and next prime (56135543).

It can be written as a sum of positive squares in 4 ways, for example, as 5476 + 56130064 = 74^2 + 7492^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56135543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17765 + ... + 20684.

It is an arithmetic number, because the mean of its divisors is an integer number (4979275).

Almost surely, 2^56135540 is an apocalyptic number.

It is an amenable number.

56135540 is an abundant number, since it is smaller than the sum of its proper divisors (63367060).

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

56135540 is a wasteful number, since it uses less digits than its factorization.

56135540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38531 (or 38529 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 56135540 is about 7492.3654475740. The cubic root of 56135540 is about 382.8946529723.

The spelling of 56135540 in words is "fifty-six million, one hundred thirty-five thousand, five hundred forty".