1553512420 has 12 divisors (see below), whose sum is σ = 3262376124. Its totient is φ = 621404960.

The previous prime is 1553512403. The next prime is 1553512423. The reversal of 1553512420 is 242153551.

It can be written as a sum of positive squares in 2 ways, for example, as 219217636 + 1334294784 = 14806^2 + 36528^2 .

It is not an unprimeable number, because it can be changed into a prime (1553512423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38837791 + ... + 38837830.

It is an arithmetic number, because the mean of its divisors is an integer number (271864677).

Almost surely, 2^1553512420 is an apocalyptic number.

1553512420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1553512420 is an abundant number, since it is smaller than the sum of its proper divisors (1708863704).

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

1553512420 is a wasteful number, since it uses less digits than its factorization.

1553512420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77675630 (or 77675628 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1553512420 is about 39414.6219060896. The cubic root of 1553512420 is about 1158.1680407770.

Adding to 1553512420 its reverse (242153551), we get a palindrome (1795665971).

It can be divided in two parts, 155 and 3512420, that added together give a triangular number (3512575 = T₂₆₅₀).

The spelling of 1553512420 in words is "one billion, five hundred fifty-three million, five hundred twelve thousand, four hundred twenty".