2151015 has 8 divisors (see below), whose sum is σ = 3441648. Its totient is φ = 1147200.

The previous prime is 2151013. The next prime is 2151031. The reversal of 2151015 is 5101512.

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

It is not a de Polignac number, because 2151015 - 2¹ = 2151013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 143401 = 2151015 / (2 + 1 + 5 + 1 + 0 + 1 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 2150985 and 2151003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71686 + ... + 71715.

It is an arithmetic number, because the mean of its divisors is an integer number (430206).

2^2151015 is an apocalyptic number.

2151015 is a deficient number, since it is larger than the sum of its proper divisors (1290633).

2151015 is a wasteful number, since it uses less digits than its factorization.

2151015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143409.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 2151015 is about 1466.6339011492. The cubic root of 2151015 is about 129.0865953035.

Adding to 2151015 its reverse (5101512), we get a palindrome (7252527).

The spelling of 2151015 in words is "two million, one hundred fifty-one thousand, fifteen".