551312440 has 64 divisors (see below), whose sum is σ = 1419768000. Its totient is φ = 188740608.

The previous prime is 551312429. The next prime is 551312441. The reversal of 551312440 is 44213155.

551312440 = T₄₅₅ + T₄₅₆ + ... + T₁₅₀₃.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551312441) 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 15 ways as a sum of consecutive naturals, for example, 292782 + ... + 294658.

It is an arithmetic number, because the mean of its divisors is an integer number (22183875).

Almost surely, 2^551312440 is an apocalyptic number.

It is an amenable number.

551312440 is an abundant number, since it is smaller than the sum of its proper divisors (868455560).

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

551312440 is a wasteful number, since it uses less digits than its factorization.

551312440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944 (or 2940 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 551312440 is about 23480.0434411864. The cubic root of 551312440 is about 819.9724559457.

Adding to 551312440 its reverse (44213155), we get a palindrome (595525595).

The spelling of 551312440 in words is "five hundred fifty-one million, three hundred twelve thousand, four hundred forty".