55820542 has 4 divisors (see below), whose sum is σ = 83730816. Its totient is φ = 27910270.

The previous prime is 55820539. The next prime is 55820561. The reversal of 55820542 is 24502855.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13955134 + ... + 13955137.

It is an arithmetic number, because the mean of its divisors is an integer number (20932704).

Almost surely, 2^55820542 is an apocalyptic number.

55820542 is a deficient number, since it is larger than the sum of its proper divisors (27910274).

55820542 is a wasteful number, since it uses less digits than its factorization.

55820542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27910273.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 55820542 is about 7471.3146098930. The cubic root of 55820542 is about 382.1771196944.

The spelling of 55820542 in words is "fifty-five million, eight hundred twenty thousand, five hundred forty-two".