56551667 has 4 divisors (see below), whose sum is σ = 56686416. Its totient is φ = 56416920.

The previous prime is 56551613. The next prime is 56551699. The reversal of 56551667 is 76615565.

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 56551667 - 2¹⁰ = 56550643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56551067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66743 + ... + 67584.

It is an arithmetic number, because the mean of its divisors is an integer number (14171604).

Almost surely, 2^56551667 is an apocalyptic number.

56551667 is a deficient number, since it is larger than the sum of its proper divisors (134749).

56551667 is a wasteful number, since it uses less digits than its factorization.

56551667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134748.

The product of its digits is 189000, while the sum is 41.

The square root of 56551667 is about 7520.0842415494. The cubic root of 56551667 is about 383.8384443195.

The spelling of 56551667 in words is "fifty-six million, five hundred fifty-one thousand, six hundred sixty-seven".