551303540 has 24 divisors (see below), whose sum is σ = 1225840392. Its totient is φ = 207549440.

The previous prime is 551303521. The next prime is 551303549. The reversal of 551303540 is 45303155.

It can be written as a sum of positive squares in 4 ways, for example, as 8133904 + 543169636 = 2852^2 + 23306^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551303549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810401 + ... + 811080.

It is an arithmetic number, because the mean of its divisors is an integer number (51076683).

Almost surely, 2^551303540 is an apocalyptic number.

It is an amenable number.

551303540 is an abundant number, since it is smaller than the sum of its proper divisors (674536852).

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

551303540 is a wasteful number, since it uses less digits than its factorization.

551303540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621507 (or 1621505 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 551303540 is about 23479.8539177738. The cubic root of 551303540 is about 819.9680435692.

Adding to 551303540 its reverse (45303155), we get a palindrome (596606695).

The spelling of 551303540 in words is "five hundred fifty-one million, three hundred three thousand, five hundred forty".