55251311 has 4 divisors (see below), whose sum is σ = 55371624. Its totient is φ = 55131000.

The previous prime is 55251307. The next prime is 55251347. The reversal of 55251311 is 11315255.

It is a happy number.

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 55251311 - 2² = 55251307 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 (55241311) 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, 59465 + ... + 60386.

It is an arithmetic number, because the mean of its divisors is an integer number (13842906).

Almost surely, 2^55251311 is an apocalyptic number.

55251311 is a deficient number, since it is larger than the sum of its proper divisors (120313).

55251311 is a wasteful number, since it uses less digits than its factorization.

55251311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120312.

The product of its digits is 750, while the sum is 23.

The square root of 55251311 is about 7433.1225605394. The cubic root of 55251311 is about 380.8735926276.

Adding to 55251311 its reverse (11315255), we get a palindrome (66566566).

The spelling of 55251311 in words is "fifty-five million, two hundred fifty-one thousand, three hundred eleven".