215031 has 8 divisors (see below), whose sum is σ = 288880. Its totient is φ = 142272.

The previous prime is 214993. The next prime is 215051. The reversal of 215031 is 130512.

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

It is not a de Polignac number, because 215031 - 2⁶ = 214967 is a prime.

It is a super-2 number, since 2×215031² = 92476661922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 214998 and 215016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531 + ... + 843.

It is an arithmetic number, because the mean of its divisors is an integer number (36110).

2²¹⁵⁰³¹ is an apocalyptic number.

215031 is a deficient number, since it is larger than the sum of its proper divisors (73849).

215031 is a wasteful number, since it uses less digits than its factorization.

215031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 215031 is about 463.7143517296. The cubic root of 215031 is about 59.9101432744.

Adding to 215031 its reverse (130512), we get a palindrome (345543).

The spelling of 215031 in words is "two hundred fifteen thousand, thirty-one".