551245540 has 24 divisors (see below), whose sum is σ = 1158688440. Its totient is φ = 220293888.

The previous prime is 551245529. The next prime is 551245559. The reversal of 551245540 is 45542155.

551245540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3779136 + 547466404 = 1944^2 + 23398^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10374 + ... + 34786.

It is an arithmetic number, because the mean of its divisors is an integer number (48278685).

Almost surely, 2^551245540 is an apocalyptic number.

It is an amenable number.

551245540 is an abundant number, since it is smaller than the sum of its proper divisors (607442900).

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

551245540 is a wasteful number, since it uses less digits than its factorization.

551245540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25551 (or 25549 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 551245540 is about 23478.6187839063. The cubic root of 551245540 is about 819.9392875930.

Adding to 551245540 its reverse (45542155), we get a palindrome (596787695).

The spelling of 551245540 in words is "five hundred fifty-one million, two hundred forty-five thousand, five hundred forty".