551342420 has 12 divisors (see below), whose sum is σ = 1157819124. Its totient is φ = 220536960.

The previous prime is 551342381. The next prime is 551342443. The reversal of 551342420 is 24243155.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66814276 + 484528144 = 8174^2 + 22012^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 551342420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13783541 + ... + 13783580.

It is an arithmetic number, because the mean of its divisors is an integer number (96484927).

Almost surely, 2^551342420 is an apocalyptic number.

It is an amenable number.

551342420 is an abundant number, since it is smaller than the sum of its proper divisors (606476704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551342420 is a wasteful number, since it uses less digits than its factorization.

551342420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27567130 (or 27567128 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 551342420 is about 23480.6818469992. The cubic root of 551342420 is about 819.9873188600.

Adding to 551342420 its reverse (24243155), we get a palindrome (575585575).

It can be divided in two parts, 55134 and 2420, that multiplied together give a triangular number (133424280 = T₁₆₃₃₅).

The spelling of 551342420 in words is "five hundred fifty-one million, three hundred forty-two thousand, four hundred twenty".