531320101 has 16 divisors (see below), whose sum is σ = 591462144. Its totient is φ = 474185664.

The previous prime is 531320093. The next prime is 531320137. The reversal of 531320101 is 101023135.

It is a cyclic number.

It is not a de Polignac number, because 531320101 - 2³ = 531320093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531327101) 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, 45475 + ... + 55951.

It is an arithmetic number, because the mean of its divisors is an integer number (36966384).

Almost surely, 2^531320101 is an apocalyptic number.

It is an amenable number.

531320101 is a deficient number, since it is larger than the sum of its proper divisors (60142043).

531320101 is a wasteful number, since it uses less digits than its factorization.

531320101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10620.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 531320101 is about 23050.3817972718. The cubic root of 531320101 is about 809.9385722862.

Adding to 531320101 its reverse (101023135), we get a palindrome (632343236).

The spelling of 531320101 in words is "five hundred thirty-one million, three hundred twenty thousand, one hundred one".