55311023 has 4 divisors (see below), whose sum is σ = 55329888. Its totient is φ = 55292160.

The previous prime is 55311017. The next prime is 55311043. The reversal of 55311023 is 32011355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32011355 = 5 ⋅6402271.

It is a cyclic number.

It is not a de Polignac number, because 55311023 - 2⁴ = 55311007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55310986 and 55311004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55311043) 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, 3986 + ... + 11247.

It is an arithmetic number, because the mean of its divisors is an integer number (13832472).

Almost surely, 2^55311023 is an apocalyptic number.

55311023 is a deficient number, since it is larger than the sum of its proper divisors (18865).

55311023 is a wasteful number, since it uses less digits than its factorization.

55311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18864.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 55311023 is about 7437.1380920351. The cubic root of 55311023 is about 381.0107509774.

Adding to 55311023 its reverse (32011355), we get a palindrome (87322378).

The spelling of 55311023 in words is "fifty-five million, three hundred eleven thousand, twenty-three".