555021012 has 72 divisors (see below), whose sum is σ = 1602705216. Its totient is φ = 146375424.

The previous prime is 555021007. The next prime is 555021013. The reversal of 555021012 is 210120555.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 555021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555021013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5353 + ... + 33744.

Almost surely, 2^555021012 is an apocalyptic number.

555021012 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 555021012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801352608).

555021012 is an abundant number, since it is smaller than the sum of its proper divisors (1047684204).

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

555021012 is a wasteful number, since it uses less digits than its factorization.

555021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39137 (or 39122 counting only the distinct ones).

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

The square root of 555021012 is about 23558.8839294225. The cubic root of 555021012 is about 821.8069472816.

Adding to 555021012 its reverse (210120555), we get a palindrome (765141567).

It can be divided in two parts, 5550 and 21012, that added together give a palindrome (26562).

The spelling of 555021012 in words is "five hundred fifty-five million, twenty-one thousand, twelve".