55420571 has 4 divisors (see below), whose sum is σ = 55726944. Its totient is φ = 55114200.

The previous prime is 55420559. The next prime is 55420577. The reversal of 55420571 is 17502455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55420571 - 2¹⁸ = 55158427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55420577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152915 + ... + 153276.

It is an arithmetic number, because the mean of its divisors is an integer number (13931736).

Almost surely, 2^55420571 is an apocalyptic number.

55420571 is a deficient number, since it is larger than the sum of its proper divisors (306373).

55420571 is a wasteful number, since it uses less digits than its factorization.

55420571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306372.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 55420571 is about 7444.4993787360. The cubic root of 55420571 is about 381.2621260678.

The spelling of 55420571 in words is "fifty-five million, four hundred twenty thousand, five hundred seventy-one".