55405350 has 384 divisors, whose sum is σ = 209986560. Its totient is φ = 10368000.

The previous prime is 55405327. The next prime is 55405379. The reversal of 55405350 is 5350455.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1351330 + ... + 1351370.

It is an arithmetic number, because the mean of its divisors is an integer number (546840).

Almost surely, 2^55405350 is an apocalyptic number.

55405350 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55405350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104993280).

55405350 is an abundant number, since it is smaller than the sum of its proper divisors (154581210).

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

55405350 is a wasteful number, since it uses less digits than its factorization.

55405350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 55405350 is about 7443.4770101076. The cubic root of 55405350 is about 381.2272189201.

It can be divided in two parts, 55405 and 350, that added together give a palindrome (55755).

The spelling of 55405350 in words is "fifty-five million, four hundred five thousand, three hundred fifty".