531563961 has 8 divisors (see below), whose sum is σ = 714333184. Its totient is φ = 351585360.

The previous prime is 531563959. The next prime is 531563983. The reversal of 531563961 is 169365135.

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

It is not a de Polignac number, because 531563961 - 2¹ = 531563959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531564961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697210 + ... + 697971.

It is an arithmetic number, because the mean of its divisors is an integer number (89291648).

Almost surely, 2^531563961 is an apocalyptic number.

It is an amenable number.

531563961 is a deficient number, since it is larger than the sum of its proper divisors (182769223).

531563961 is a wasteful number, since it uses less digits than its factorization.

531563961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395311.

The product of its digits is 72900, while the sum is 39.

The square root of 531563961 is about 23055.6709076097. The cubic root of 531563961 is about 810.0624658426.

The spelling of 531563961 in words is "five hundred thirty-one million, five hundred sixty-three thousand, nine hundred sixty-one".