551205240 has 32 divisors (see below), whose sum is σ = 1653616080. Its totient is φ = 146988032.

The previous prime is 551205227. The next prime is 551205251. The reversal of 551205240 is 42502155.

It is a happy number.

551205240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 551205240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2296569 + ... + 2296808.

Almost surely, 2^551205240 is an apocalyptic number.

It is an amenable number.

551205240 is an abundant number, since it is smaller than the sum of its proper divisors (1102410840).

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

551205240 is a wasteful number, since it uses less digits than its factorization.

551205240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4593391 (or 4593387 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 551205240 is about 23477.7605405626. The cubic root of 551205240 is about 819.9193059598.

Adding to 551205240 its reverse (42502155), we get a palindrome (593707395).

The spelling of 551205240 in words is "five hundred fifty-one million, two hundred five thousand, two hundred forty".