55801011 has 8 divisors (see below), whose sum is σ = 85030144. Its totient is φ = 31886280.

The previous prime is 55801007. The next prime is 55801019. The reversal of 55801011 is 11010855.

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

It is not a de Polignac number, because 55801011 - 2² = 55801007 is a prime.

It is a super-2 number, since 2×55801011² = 6227505657244242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2657191 = 55801011 / (5 + 5 + 8 + 0 + 1 + 0 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55801019) 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, 1328575 + ... + 1328616.

It is an arithmetic number, because the mean of its divisors is an integer number (10628768).

Almost surely, 2^55801011 is an apocalyptic number.

55801011 is a deficient number, since it is larger than the sum of its proper divisors (29229133).

55801011 is a wasteful number, since it uses less digits than its factorization.

55801011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657201.

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 55801011 is about 7470.0074297152. The cubic root of 55801011 is about 382.1325412901.

Adding to 55801011 its reverse (11010855), we get a palindrome (66811866).

The spelling of 55801011 in words is "fifty-five million, eight hundred one thousand, eleven".