551242423 has 2 divisors, whose sum is σ = 551242424. Its totient is φ = 551242422.

The previous prime is 551242409. The next prime is 551242463. The reversal of 551242423 is 324242155.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551242423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551242391 and 551242400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551242463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275621211 + 275621212.

It is an arithmetic number, because the mean of its divisors is an integer number (275621212).

Almost surely, 2^551242423 is an apocalyptic number.

551242423 is a deficient number, since it is larger than the sum of its proper divisors (1).

551242423 is an equidigital number, since it uses as much as digits as its factorization.

551242423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 28.

The square root of 551242423 is about 23478.5524042689. The cubic root of 551242423 is about 819.9377421501.

Adding to 551242423 its reverse (324242155), we get a palindrome (875484578).

The spelling of 551242423 in words is "five hundred fifty-one million, two hundred forty-two thousand, four hundred twenty-three".