55556340 has 192 divisors, whose sum is σ = 195084288. Its totient is φ = 11520000.

The previous prime is 55556317. The next prime is 55556341. The reversal of 55556340 is 4365555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55556341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 221215 + ... + 221465.

It is an arithmetic number, because the mean of its divisors is an integer number (1016064).

Almost surely, 2^55556340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55556340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97542144).

55556340 is an abundant number, since it is smaller than the sum of its proper divisors (139527948).

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

55556340 is a wasteful number, since it uses less digits than its factorization.

55556340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 33.

The square root of 55556340 is about 7453.6125469466. The cubic root of 55556340 is about 381.5732101054.

The spelling of 55556340 in words is "fifty-five million, five hundred fifty-six thousand, three hundred forty".