55251111 has 8 divisors (see below), whose sum is σ = 74496240. Its totient is φ = 36420032.

The previous prime is 55251089. The next prime is 55251113. The reversal of 55251111 is 11115255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55251111 - 2⁶ = 55251047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55251113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103200 + ... + 103733.

It is an arithmetic number, because the mean of its divisors is an integer number (9312030).

Almost surely, 2^55251111 is an apocalyptic number.

55251111 is a deficient number, since it is larger than the sum of its proper divisors (19245129).

55251111 is a wasteful number, since it uses less digits than its factorization.

55251111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207025.

The product of its digits is 250, while the sum is 21.

The square root of 55251111 is about 7433.1091072310. The cubic root of 55251111 is about 380.8731330619.

Adding to 55251111 its reverse (11115255), we get a palindrome (66366366).

The spelling of 55251111 in words is "fifty-five million, two hundred fifty-one thousand, one hundred eleven".