531255913 has 4 divisors (see below), whose sum is σ = 531387988. Its totient is φ = 531123840.

The previous prime is 531255911. The next prime is 531255943. The reversal of 531255913 is 319552135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133333209 + 397922704 = 11547^2 + 19948^2 .

It is a cyclic number.

It is not a de Polignac number, because 531255913 - 2¹ = 531255911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531255911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59808 + ... + 68113.

It is an arithmetic number, because the mean of its divisors is an integer number (132846997).

Almost surely, 2^531255913 is an apocalyptic number.

It is an amenable number.

531255913 is a deficient number, since it is larger than the sum of its proper divisors (132075).

531255913 is a wasteful number, since it uses less digits than its factorization.

531255913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132074.

The product of its digits is 20250, while the sum is 34.

The square root of 531255913 is about 23048.9894138550. The cubic root of 531255913 is about 809.9059551435.

The spelling of 531255913 in words is "five hundred thirty-one million, two hundred fifty-five thousand, nine hundred thirteen".