55571400 has 192 divisors, whose sum is σ = 196862400. Its totient is φ = 14400000.

The previous prime is 55571389. The next prime is 55571407. The reversal of 55571400 is 417555.

55571400 is a `hidden beast` number, since 55 + 571 + 40 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (55571407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221275 + ... + 221525.

It is an arithmetic number, because the mean of its divisors is an integer number (1025325).

Almost surely, 2^55571400 is an apocalyptic number.

55571400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55571400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98431200).

55571400 is an abundant number, since it is smaller than the sum of its proper divisors (141291000).

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

55571400 is a wasteful number, since it uses less digits than its factorization.

55571400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 55571400 is about 7454.6227268722. The cubic root of 55571400 is about 381.6076854589.

Adding to 55571400 its reverse (417555), we get a palindrome (55988955).

The spelling of 55571400 in words is "fifty-five million, five hundred seventy-one thousand, four hundred".