1553532420 has 96 divisors (see below), whose sum is σ = 5024509056. Its totient is φ = 354457600.

The previous prime is 1553532413. The next prime is 1553532439. The reversal of 1553532420 is 242353551.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58011 + ... + 80450.

It is an arithmetic number, because the mean of its divisors is an integer number (52338636).

Almost surely, 2^1553532420 is an apocalyptic number.

1553532420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1553532420 is an abundant number, since it is smaller than the sum of its proper divisors (3470976636).

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

1553532420 is a wasteful number, since it uses less digits than its factorization.

1553532420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138501 (or 138499 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 1553532420 is about 39414.8756182231. The cubic root of 1553532420 is about 1158.1730108609.

Adding to 1553532420 its reverse (242353551), we get a palindrome (1795885971).

The spelling of 1553532420 in words is "one billion, five hundred fifty-three million, five hundred thirty-two thousand, four hundred twenty".