55519040 has 28 divisors (see below), whose sum is σ = 132205476. Its totient is φ = 22207488.

The previous prime is 55519027. The next prime is 55519049. The reversal of 55519040 is 4091555.

It can be written as a sum of positive squares in 2 ways, for example, as 42094144 + 13424896 = 6488^2 + 3664^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55518994 and 55519012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55519049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86429 + ... + 87068.

Almost surely, 2^55519040 is an apocalyptic number.

It is an amenable number.

55519040 is an abundant number, since it is smaller than the sum of its proper divisors (76686436).

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

55519040 is a wasteful number, since it uses less digits than its factorization.

55519040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173514 (or 173504 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 55519040 is about 7451.1099844251. The cubic root of 55519040 is about 381.4877961086.

The spelling of 55519040 in words is "fifty-five million, five hundred nineteen thousand, forty".