55242023 has 2 divisors, whose sum is σ = 55242024. Its totient is φ = 55242022.

The previous prime is 55242017. The next prime is 55242037. The reversal of 55242023 is 32024255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55242023 - 2⁴ = 55242007 is a prime.

It is a super-2 number, since 2×55242023² = 6103362210265058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55242023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55242043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27621011 + 27621012.

It is an arithmetic number, because the mean of its divisors is an integer number (27621012).

Almost surely, 2^55242023 is an apocalyptic number.

55242023 is a deficient number, since it is larger than the sum of its proper divisors (1).

55242023 is an equidigital number, since it uses as much as digits as its factorization.

55242023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 55242023 is about 7432.4977632018. The cubic root of 55242023 is about 380.8522492295.

Adding to 55242023 its reverse (32024255), we get a palindrome (87266278).

The spelling of 55242023 in words is "fifty-five million, two hundred forty-two thousand, twenty-three".