55133013 has 16 divisors (see below), whose sum is σ = 79352000. Its totient is φ = 33848064.

The previous prime is 55132993. The next prime is 55133017. The reversal of 55133013 is 31033155.

It is a happy number.

It is not a de Polignac number, because 55133013 - 2⁵ = 55132981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55133017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18045 + ... + 20877.

It is an arithmetic number, because the mean of its divisors is an integer number (4959500).

Almost surely, 2^55133013 is an apocalyptic number.

It is an amenable number.

55133013 is a deficient number, since it is larger than the sum of its proper divisors (24218987).

55133013 is a wasteful number, since it uses less digits than its factorization.

55133013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348.

The product of its (nonzero) digits is 675, while the sum is 21.

The square root of 55133013 is about 7425.1608063395. The cubic root of 55133013 is about 380.6015702479.

Adding to 55133013 its reverse (31033155), we get a palindrome (86166168).

The spelling of 55133013 in words is "fifty-five million, one hundred thirty-three thousand, thirteen".