531215 has 4 divisors (see below), whose sum is σ = 637464. Its totient is φ = 424968.

The previous prime is 531203. The next prime is 531229. The reversal of 531215 is 512135.

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

It is a cyclic number.

It is not a de Polignac number, because 531215 - 2¹⁴ = 514831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531193 and 531202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53117 + ... + 53126.

It is an arithmetic number, because the mean of its divisors is an integer number (159366).

2⁵³¹²¹⁵ is an apocalyptic number.

531215 is a deficient number, since it is larger than the sum of its proper divisors (106249).

531215 is a wasteful number, since it uses less digits than its factorization.

531215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106248.

The product of its digits is 150, while the sum is 17.

The square root of 531215 is about 728.8449766583. The cubic root of 531215 is about 80.9885163825.

The spelling of 531215 in words is "five hundred thirty-one thousand, two hundred fifteen".