56551011 has 48 divisors (see below), whose sum is σ = 89538048. Its totient is φ = 31464000.

The previous prime is 56551009. The next prime is 56551021. The reversal of 56551011 is 11015565.

It is not a de Polignac number, because 56551011 - 2¹ = 56551009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56551021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 559861 + ... + 559961.

It is an arithmetic number, because the mean of its divisors is an integer number (1865376).

Almost surely, 2^56551011 is an apocalyptic number.

56551011 is a deficient number, since it is larger than the sum of its proper divisors (32987037).

56551011 is a wasteful number, since it uses less digits than its factorization.

56551011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 56551011 is about 7520.0406248903. The cubic root of 56551011 is about 383.8369601370.

Adding to 56551011 its reverse (11015565), we get a palindrome (67566576).

It can be divided in two parts, 5655 and 1011, that added together give a palindrome (6666).

The spelling of 56551011 in words is "fifty-six million, five hundred fifty-one thousand, eleven".