53561040 has 80 divisors (see below), whose sum is σ = 178821888. Its totient is φ = 13183488.

The previous prime is 53561029. The next prime is 53561041. The reversal of 53561040 is 4016535.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 53561040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53561041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5464 + ... + 11703.

Almost surely, 2^53561040 is an apocalyptic number.

It is an amenable number.

53561040 is an abundant number, since it is smaller than the sum of its proper divisors (125260848).

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

53561040 is a wasteful number, since it uses less digits than its factorization.

53561040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17196 (or 17190 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 53561040 is about 7318.5408381726. The cubic root of 53561040 is about 376.9493514080.

Adding to 53561040 its reverse (4016535), we get a palindrome (57577575).

The spelling of 53561040 in words is "fifty-three million, five hundred sixty-one thousand, forty".