56417561 has 4 divisors (see below), whose sum is σ = 56566800. Its totient is φ = 56268324.

The previous prime is 56417503. The next prime is 56417573. The reversal of 56417561 is 16571465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56417561 - 2¹⁸ = 56155417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56417461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74051 + ... + 74808.

It is an arithmetic number, because the mean of its divisors is an integer number (14141700).

Almost surely, 2^56417561 is an apocalyptic number.

It is an amenable number.

56417561 is a deficient number, since it is larger than the sum of its proper divisors (149239).

56417561 is a wasteful number, since it uses less digits than its factorization.

56417561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149238.

The product of its digits is 25200, while the sum is 35.

The square root of 56417561 is about 7511.1624266820. The cubic root of 56417561 is about 383.5347940828.

The spelling of 56417561 in words is "fifty-six million, four hundred seventeen thousand, five hundred sixty-one".