55016231 has 4 divisors (see below), whose sum is σ = 55769952. Its totient is φ = 54262512.

The previous prime is 55016189. The next prime is 55016237. The reversal of 55016231 is 13261055.

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

It is a cyclic number.

It is not a de Polignac number, because 55016231 - 2⁶ = 55016167 is a prime.

It is a super-2 number, since 2×55016231² = 6053571346890722, 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 = 55016197 and 55016206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55016237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376751 + ... + 376896.

It is an arithmetic number, because the mean of its divisors is an integer number (13942488).

Almost surely, 2^55016231 is an apocalyptic number.

55016231 is a deficient number, since it is larger than the sum of its proper divisors (753721).

55016231 is an equidigital number, since it uses as much as digits as its factorization.

55016231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753720.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 55016231 is about 7417.2927001703. The cubic root of 55016231 is about 380.3326519249.

Adding to 55016231 its reverse (13261055), we get a palindrome (68277286).

The spelling of 55016231 in words is "fifty-five million, sixteen thousand, two hundred thirty-one".