56421355 has 16 divisors (see below), whose sum is σ = 71701920. Its totient is φ = 42501888.

The previous prime is 56421353. The next prime is 56421359. The reversal of 56421355 is 55312465.

It is a cyclic number.

It is not a de Polignac number, because 56421355 - 2¹ = 56421353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56421353) 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, 14719 + ... + 18151.

It is an arithmetic number, because the mean of its divisors is an integer number (4481370).

Almost surely, 2^56421355 is an apocalyptic number.

56421355 is a deficient number, since it is larger than the sum of its proper divisors (15280565).

56421355 is a wasteful number, since it uses less digits than its factorization.

56421355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630.

The product of its digits is 18000, while the sum is 31.

The square root of 56421355 is about 7511.4149798823. The cubic root of 56421355 is about 383.5433912782.

The spelling of 56421355 in words is "fifty-six million, four hundred twenty-one thousand, three hundred fifty-five".