55461040 has 40 divisors (see below), whose sum is σ = 129366720. Its totient is φ = 22112256.

The previous prime is 55461037. The next prime is 55461041. The reversal of 55461040 is 4016455.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 55460996 and 55461014.

It is not an unprimeable number, because it can be changed into a prime (55461041) 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 7 ways as a sum of consecutive naturals, for example, 28416 + ... + 30304.

It is an arithmetic number, because the mean of its divisors is an integer number (3234168).

Almost surely, 2^55461040 is an apocalyptic number.

It is an amenable number.

55461040 is an abundant number, since it is smaller than the sum of its proper divisors (73905680).

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

55461040 is a wasteful number, since it uses less digits than its factorization.

55461040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269 (or 2263 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 55461040 is about 7447.2169298336. The cubic root of 55461040 is about 381.3549047518.

Adding to 55461040 its reverse (4016455), we get a palindrome (59477495).

The spelling of 55461040 in words is "fifty-five million, four hundred sixty-one thousand, forty".