55133051223 has 4 divisors (see below), whose sum is σ = 73510734968. Its totient is φ = 36755367480.

The previous prime is 55133051219. The next prime is 55133051243. The reversal of 55133051223 is 32215033155.

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

It is not a de Polignac number, because 55133051223 - 2² = 55133051219 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 (55133051243) 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, 9188841868 + ... + 9188841873.

It is an arithmetic number, because the mean of its divisors is an integer number (18377683742).

Almost surely, 2^55133051223 is an apocalyptic number.

55133051223 is a deficient number, since it is larger than the sum of its proper divisors (18377683745).

55133051223 is a wasteful number, since it uses less digits than its factorization.

55133051223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18377683744.

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 55133051223 its reverse (32215033155), we get a palindrome (87348084378).

The spelling of 55133051223 in words is "fifty-five billion, one hundred thirty-three million, fifty-one thousand, two hundred twenty-three".