55142223 has 16 divisors (see below), whose sum is σ = 74570496. Its totient is φ = 36241920.

The previous prime is 55142189. The next prime is 55142239. The reversal of 55142223 is 32224155.

It is not a de Polignac number, because 55142223 - 2⁸ = 55141967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55142193 and 55142202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55142023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75486 + ... + 76212.

It is an arithmetic number, because the mean of its divisors is an integer number (4660656).

Almost surely, 2^55142223 is an apocalyptic number.

55142223 is a deficient number, since it is larger than the sum of its proper divisors (19428273).

55142223 is a wasteful number, since it uses less digits than its factorization.

55142223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054.

The product of its digits is 2400, while the sum is 24.

The square root of 55142223 is about 7425.7809690295. The cubic root of 55142223 is about 380.6227623014.

Adding to 55142223 its reverse (32224155), we get a palindrome (87366378).

The spelling of 55142223 in words is "fifty-five million, one hundred forty-two thousand, two hundred twenty-three".