55542231 has 6 divisors (see below), whose sum is σ = 80227680. Its totient is φ = 37028148.

The previous prime is 55542229. The next prime is 55542239. The reversal of 55542231 is 13224555.

It is a happy number.

It is not a de Polignac number, because 55542231 - 2¹ = 55542229 is a prime.

It is a super-2 number, since 2×55542231² = 6169878848914722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55542195 and 55542204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55542239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3085671 + ... + 3085688.

It is an arithmetic number, because the mean of its divisors is an integer number (13371280).

Almost surely, 2^55542231 is an apocalyptic number.

55542231 is a deficient number, since it is larger than the sum of its proper divisors (24685449).

55542231 is a wasteful number, since it uses less digits than its factorization.

55542231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171365 (or 6171362 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 55542231 is about 7452.6660330381. Note that the first 3 decimals coincide. The cubic root of 55542231 is about 381.5409061282.

Adding to 55542231 its reverse (13224555), we get a palindrome (68766786).

The spelling of 55542231 in words is "fifty-five million, five hundred forty-two thousand, two hundred thirty-one".