1620531132 has 48 divisors (see below), whose sum is σ = 4127760000. Its totient is φ = 490740160.

The previous prime is 1620531131. The next prime is 1620531151. The reversal of 1620531132 is 2311350261.

It is a super-2 number, since 2×1620531132² = 5252242299562402848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620531131) 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 15 ways as a sum of consecutive naturals, for example, 254119 + ... + 260417.

It is an arithmetic number, because the mean of its divisors is an integer number (85995000).

Almost surely, 2^1620531132 is an apocalyptic number.

1620531132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1620531132 is an abundant number, since it is smaller than the sum of its proper divisors (2507228868).

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

1620531132 is a wasteful number, since it uses less digits than its factorization.

1620531132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8266 (or 8264 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1620531132 is about 40255.8210945945. The cubic root of 1620531132 is about 1174.5886308865.

Adding to 1620531132 its reverse (2311350261), we get a palindrome (3931881393).

The spelling of 1620531132 in words is "one billion, six hundred twenty million, five hundred thirty-one thousand, one hundred thirty-two".