55351231 has 4 divisors (see below), whose sum is σ = 59609032. Its totient is φ = 51093432.

The previous prime is 55351229. The next prime is 55351259. The reversal of 55351231 is 13215355.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55351231 - 2¹ = 55351229 is a prime.

It is a super-2 number, since 2×55351231² = 6127517546430722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55351196 and 55351205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55351291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128881 + ... + 2128906.

It is an arithmetic number, because the mean of its divisors is an integer number (14902258).

Almost surely, 2^55351231 is an apocalyptic number.

55351231 is a deficient number, since it is larger than the sum of its proper divisors (4257801).

55351231 is a wasteful number, since it uses less digits than its factorization.

55351231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4257800.

The product of its digits is 2250, while the sum is 25.

The square root of 55351231 is about 7439.8407913073. The cubic root of 55351231 is about 381.1030530705.

Adding to 55351231 its reverse (13215355), we get a palindrome (68566586).

The spelling of 55351231 in words is "fifty-five million, three hundred fifty-one thousand, two hundred thirty-one".