55623311 has 4 divisors (see below), whose sum is σ = 55669800. Its totient is φ = 55576824.

The previous prime is 55623307. The next prime is 55623329. The reversal of 55623311 is 11332655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11332655 = 5 ⋅2266531.

It is a cyclic number.

It is not a de Polignac number, because 55623311 - 2² = 55623307 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 (55623301) 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, 21401 + ... + 23858.

It is an arithmetic number, because the mean of its divisors is an integer number (13917450).

Almost surely, 2^55623311 is an apocalyptic number.

55623311 is a deficient number, since it is larger than the sum of its proper divisors (46489).

55623311 is a wasteful number, since it uses less digits than its factorization.

55623311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46488.

The product of its digits is 2700, while the sum is 26.

The square root of 55623311 is about 7458.1037134113. The cubic root of 55623311 is about 381.7264724098.

Adding to 55623311 its reverse (11332655), we get a palindrome (66955966).

The spelling of 55623311 in words is "fifty-five million, six hundred twenty-three thousand, three hundred eleven".