55561011 has 8 divisors (see below), whose sum is σ = 80816064. Its totient is φ = 33673320.

The previous prime is 55561001. The next prime is 55561043. The reversal of 55561011 is 11016555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55561011 - 2¹⁷ = 55429939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55561001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841801 + ... + 841866.

It is an arithmetic number, because the mean of its divisors is an integer number (10102008).

Almost surely, 2^55561011 is an apocalyptic number.

55561011 is a deficient number, since it is larger than the sum of its proper divisors (25255053).

55561011 is a wasteful number, since it uses less digits than its factorization.

55561011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683681.

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

The square root of 55561011 is about 7453.9258783543. The cubic root of 55561011 is about 381.5839036256.

Adding to 55561011 its reverse (11016555), we get a palindrome (66577566).

The spelling of 55561011 in words is "fifty-five million, five hundred sixty-one thousand, eleven".