56821055 has 16 divisors (see below), whose sum is σ = 72524160. Its totient is φ = 42588672.

The previous prime is 56821049. The next prime is 56821057. The reversal of 56821055 is 55012865.

It is not a de Polignac number, because 56821055 - 2⁶ = 56820991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56821057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18917 + ... + 21713.

It is an arithmetic number, because the mean of its divisors is an integer number (4532760).

Almost surely, 2^56821055 is an apocalyptic number.

56821055 is a deficient number, since it is larger than the sum of its proper divisors (15703105).

56821055 is a wasteful number, since it uses less digits than its factorization.

56821055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 56821055 is about 7537.9741973557. The cubic root of 56821055 is about 384.4469599338.

The spelling of 56821055 in words is "fifty-six million, eight hundred twenty-one thousand, fifty-five".