551341440 has 384 divisors, whose sum is σ = 2116296000. Its totient is φ = 131383296.

The previous prime is 551341421. The next prime is 551341447. The reversal of 551341440 is 44143155.

It is a happy number.

551341440 is a `hidden beast` number, since 5 + 513 + 4 + 144 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×551341440² = 607954766922547200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551341447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2770461 + ... + 2770659.

Almost surely, 2^551341440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551341440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1058148000).

551341440 is an abundant number, since it is smaller than the sum of its proper divisors (1564954560).

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

551341440 is a wasteful number, since it uses less digits than its factorization.

551341440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 551341440 is about 23480.6609787714. The cubic root of 551341440 is about 819.9868330228.

Adding to 551341440 its reverse (44143155), we get a palindrome (595484595).

The spelling of 551341440 in words is "five hundred fifty-one million, three hundred forty-one thousand, four hundred forty".