523215 has 48 divisors (see below), whose sum is σ = 1138176. Its totient is φ = 216000.

The previous prime is 523213. The next prime is 523219. The reversal of 523215 is 512325.

It is a happy number.

It is not a de Polignac number, because 523215 - 2¹ = 523213 is a prime.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3390 + ... + 3540.

It is an arithmetic number, because the mean of its divisors is an integer number (23712).

2⁵²³²¹⁵ is an apocalyptic number.

523215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

523215 is an abundant number, since it is smaller than the sum of its proper divisors (614961).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

523215 is a wasteful number, since it uses less digits than its factorization.

523215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 177 counting only the distinct ones).

The product of its digits is 300, while the sum is 18.

The square root of 523215 is about 723.3360215004. The cubic root of 523215 is about 80.5799008638.

It can be divided in two parts, 52321 and 5, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 523215 in words is "five hundred twenty-three thousand, two hundred fifteen".