55142311 has 8 divisors (see below), whose sum is σ = 65193120. Its totient is φ = 45634848.

The previous prime is 55142309. The next prime is 55142317. The reversal of 55142311 is 11324155.

It is a happy number.

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

It is not a de Polignac number, because 55142311 - 2¹ = 55142309 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 (55142317) 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, 135616 + ... + 136021.

It is an arithmetic number, because the mean of its divisors is an integer number (8149140).

Almost surely, 2^55142311 is an apocalyptic number.

55142311 is a deficient number, since it is larger than the sum of its proper divisors (10050809).

55142311 is a wasteful number, since it uses less digits than its factorization.

55142311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271673.

The product of its digits is 600, while the sum is 22.

The square root of 55142311 is about 7425.7868943298. The cubic root of 55142311 is about 380.6229647766.

Adding to 55142311 its reverse (11324155), we get a palindrome (66466466).

The spelling of 55142311 in words is "fifty-five million, one hundred forty-two thousand, three hundred eleven".