551015040 has 64 divisors (see below), whose sum is σ = 1756366560. Its totient is φ = 146936832.

The previous prime is 551015021. The next prime is 551015041. The reversal of 551015040 is 40510155.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 551014998 and 551015016.

It is not an unprimeable number, because it can be changed into a prime (551015041) 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, 141574 + ... + 145413.

Almost surely, 2^551015040 is an apocalyptic number.

It is an amenable number.

551015040 is an abundant number, since it is smaller than the sum of its proper divisors (1205351520).

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

551015040 is a wasteful number, since it uses less digits than its factorization.

551015040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287009 (or 286997 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 551015040 is about 23473.7095491957. The cubic root of 551015040 is about 819.8249874366.

Adding to 551015040 its reverse (40510155), we get a palindrome (591525195).

The spelling of 551015040 in words is "five hundred fifty-one million, fifteen thousand, forty".