555531240 has 64 divisors (see below), whose sum is σ = 1818106560. Its totient is φ = 134673920.

The previous prime is 555531227. The next prime is 555531257. The reversal of 555531240 is 42135555.

It is a happy number.

555531240 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×555531240² = 617229917231875200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 555531198 and 555531207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209109 + ... + 211748.

It is an arithmetic number, because the mean of its divisors is an integer number (28407915).

Almost surely, 2^555531240 is an apocalyptic number.

It is an amenable number.

555531240 is an abundant number, since it is smaller than the sum of its proper divisors (1262575320).

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

555531240 is a wasteful number, since it uses less digits than its factorization.

555531240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420882 (or 420878 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 555531240 is about 23569.7102230808. The cubic root of 555531240 is about 822.0586978052.

Adding to 555531240 its reverse (42135555), we get a palindrome (597666795).

The spelling of 555531240 in words is "five hundred fifty-five million, five hundred thirty-one thousand, two hundred forty".