55418140 has 12 divisors (see below), whose sum is σ = 116378136. Its totient is φ = 22167248.

The previous prime is 55418131. The next prime is 55418171. The reversal of 55418140 is 4181455.

It is a junction number, because it is equal to n+sod(n) for n = 55418099 and 55418108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385434 + ... + 1385473.

It is an arithmetic number, because the mean of its divisors is an integer number (9698178).

Almost surely, 2^55418140 is an apocalyptic number.

It is an amenable number.

55418140 is an abundant number, since it is smaller than the sum of its proper divisors (60959996).

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

55418140 is a wasteful number, since it uses less digits than its factorization.

55418140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770916 (or 2770914 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 55418140 is about 7444.3361020309. The cubic root of 55418140 is about 381.2565513521.

Adding to 55418140 its reverse (4181455), we get a palindrome (59599595).

It can be divided in two parts, 5 and 5418140, that added together give a palindrome (5418145).

The spelling of 55418140 in words is "fifty-five million, four hundred eighteen thousand, one hundred forty".