531126205 has 8 divisors (see below), whose sum is σ = 637483104. Its totient is φ = 424813200.

The previous prime is 531126203. The next prime is 531126227. The reversal of 531126205 is 502621135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531126205 - 2¹ = 531126203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531126205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531126203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28690 + ... + 43420.

It is an arithmetic number, because the mean of its divisors is an integer number (79685388).

Almost surely, 2^531126205 is an apocalyptic number.

It is an amenable number.

531126205 is a deficient number, since it is larger than the sum of its proper divisors (106356899).

531126205 is a wasteful number, since it uses less digits than its factorization.

531126205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21947.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 531126205 is about 23046.1754961642. The cubic root of 531126205 is about 809.8400359824.

It can be divided in two parts, 531 and 126205, that added together give a square (126736 = 356²).

The spelling of 531126205 in words is "five hundred thirty-one million, one hundred twenty-six thousand, two hundred five".