1555130020 has 24 divisors (see below), whose sum is σ = 3267742968. Its totient is φ = 621676800.

The previous prime is 1555129999. The next prime is 1555130033. The reversal of 1555130020 is 200315551.

It can be written as a sum of positive squares in 4 ways, for example, as 37871716 + 1517258304 = 6154^2 + 38952^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1555129973 and 1555130000.

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, 11830 + ... + 57010.

It is an arithmetic number, because the mean of its divisors is an integer number (136155957).

Almost surely, 2^1555130020 is an apocalyptic number.

1555130020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1555130020 is an abundant number, since it is smaller than the sum of its proper divisors (1712612948).

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

1555130020 is a wasteful number, since it uses less digits than its factorization.

1555130020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46911 (or 46909 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 1555130020 is about 39435.1368705625. The cubic root of 1555130020 is about 1158.5698834505.

Adding to 1555130020 its reverse (200315551), we get a palindrome (1755445571).

The spelling of 1555130020 in words is "one billion, five hundred fifty-five million, one hundred thirty thousand, twenty".