215137 has 12 divisors (see below), whose sum is σ = 248880. Its totient is φ = 185328.

The previous prime is 215123. The next prime is 215141. The reversal of 215137 is 731512.

It is a de Polignac number, because none of the positive numbers 2^k-215137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

215137 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (215197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3178 + ... + 3244.

It is an arithmetic number, because the mean of its divisors is an integer number (20740).

2²¹⁵¹³⁷ is an apocalyptic number.

It is an amenable number.

215137 is a deficient number, since it is larger than the sum of its proper divisors (33743).

215137 is a wasteful number, since it uses less digits than its factorization.

215137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 99 counting only the distinct ones).

The product of its digits is 210, while the sum is 19.

The square root of 215137 is about 463.8286321477. The cubic root of 215137 is about 59.9199859359.

Adding to 215137 its reverse (731512), we get a palindrome (946649).

The spelling of 215137 in words is "two hundred fifteen thousand, one hundred thirty-seven".