55119440 has 40 divisors (see below), whose sum is σ = 135694440. Its totient is φ = 20750336.

The previous prime is 55119439. The next prime is 55119443. The reversal of 55119440 is 4491155.

It can be written as a sum of positive squares in 4 ways, for example, as 25482304 + 29637136 = 5048^2 + 5444^2 .

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

It is a super-5 number, since 5×55119440⁵ (a number of 40 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55119443) 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, 18905 + ... + 21624.

It is an arithmetic number, because the mean of its divisors is an integer number (3392361).

Almost surely, 2^55119440 is an apocalyptic number.

It is an amenable number.

55119440 is an abundant number, since it is smaller than the sum of its proper divisors (80575000).

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

55119440 is a wasteful number, since it uses less digits than its factorization.

55119440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40559 (or 40553 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 55119440 is about 7424.2467631404. The cubic root of 55119440 is about 380.5703347031.

It can be divided in two parts, 551 and 19440, that added together give a palindrome (19991).

The spelling of 55119440 in words is "fifty-five million, one hundred nineteen thousand, four hundred forty".