551395420 has 12 divisors (see below), whose sum is σ = 1157930424. Its totient is φ = 220558160.

The previous prime is 551395387. The next prime is 551395421. The reversal of 551395420 is 24593155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551395421) by changing a digit.

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, 13784866 + ... + 13784905.

It is an arithmetic number, because the mean of its divisors is an integer number (96494202).

Almost surely, 2^551395420 is an apocalyptic number.

It is an amenable number.

551395420 is an abundant number, since it is smaller than the sum of its proper divisors (606535004).

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

551395420 is a wasteful number, since it uses less digits than its factorization.

551395420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27569780 (or 27569778 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 551395420 is about 23481.8104072067. The cubic root of 551395420 is about 820.0135928740.

The spelling of 551395420 in words is "five hundred fifty-one million, three hundred ninety-five thousand, four hundred twenty".