551511140 has 24 divisors (see below), whose sum is σ = 1159038720. Its totient is φ = 220439648.

The previous prime is 551511101. The next prime is 551511143. The reversal of 551511140 is 41115155.

It is not an unprimeable number, because it can be changed into a prime (551511143) 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, 19199 + ... + 38361.

It is an arithmetic number, because the mean of its divisors is an integer number (48293280).

Almost surely, 2^551511140 is an apocalyptic number.

It is an amenable number.

551511140 is an abundant number, since it is smaller than the sum of its proper divisors (607527580).

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

551511140 is a wasteful number, since it uses less digits than its factorization.

551511140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20611 (or 20609 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 551511140 is about 23484.2743128247. The cubic root of 551511140 is about 820.0709536065.

Adding to 551511140 its reverse (41115155), we get a palindrome (592626295).

The spelling of 551511140 in words is "five hundred fifty-one million, five hundred eleven thousand, one hundred forty".