56421505 has 16 divisors (see below), whose sum is σ = 78180480. Its totient is φ = 38287872.

The previous prime is 56421503. The next prime is 56421557. The reversal of 56421505 is 50512465.

56421505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56421505 - 2¹ = 56421503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56421503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4915 + ... + 11704.

It is an arithmetic number, because the mean of its divisors is an integer number (4886280).

Almost surely, 2^56421505 is an apocalyptic number.

It is an amenable number.

56421505 is a deficient number, since it is larger than the sum of its proper divisors (21758975).

56421505 is a wasteful number, since it uses less digits than its factorization.

56421505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16728.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 56421505 is about 7511.4249646788. The cubic root of 56421505 is about 383.5437311700.

The spelling of 56421505 in words is "fifty-six million, four hundred twenty-one thousand, five hundred five".