55331013 has 4 divisors (see below), whose sum is σ = 73774688. Its totient is φ = 36887340.

The previous prime is 55331011. The next prime is 55331041. The reversal of 55331013 is 31013355.

It is a happy number.

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 not a de Polignac number, because 55331013 - 2¹ = 55331011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55331011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9221833 + ... + 9221838.

It is an arithmetic number, because the mean of its divisors is an integer number (18443672).

Almost surely, 2^55331013 is an apocalyptic number.

It is an amenable number.

55331013 is a deficient number, since it is larger than the sum of its proper divisors (18443675).

55331013 is a wasteful number, since it uses less digits than its factorization.

55331013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18443674.

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

The square root of 55331013 is about 7438.4819015710. The cubic root of 55331013 is about 381.0566459132.

Adding to 55331013 its reverse (31013355), we get a palindrome (86344368).

The spelling of 55331013 in words is "fifty-five million, three hundred thirty-one thousand, thirteen".