55570401 has 8 divisors (see below), whose sum is σ = 82326560. Its totient is φ = 37046916.

The previous prime is 55570397. The next prime is 55570423. The reversal of 55570401 is 10407555.

55570401 is a `hidden beast` number, since 55 + 570 + 40 + 1 = 666.

It is not a de Polignac number, because 55570401 - 2² = 55570397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2058163 = 55570401 / (5 + 5 + 5 + 7 + 0 + 4 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55570481) 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, 1029055 + ... + 1029108.

It is an arithmetic number, because the mean of its divisors is an integer number (10290820).

Almost surely, 2^55570401 is an apocalyptic number.

It is an amenable number.

55570401 is a deficient number, since it is larger than the sum of its proper divisors (26756159).

55570401 is a wasteful number, since it uses less digits than its factorization.

55570401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058172 (or 2058166 counting only the distinct ones).

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

The square root of 55570401 is about 7454.5557211681. Note that the first 3 decimals coincide. The cubic root of 55570401 is about 381.6053987409.

Adding to 55570401 its reverse (10407555), we get a palindrome (65977956).

The spelling of 55570401 in words is "fifty-five million, five hundred seventy thousand, four hundred one".