2151505 has 8 divisors (see below), whose sum is σ = 2642112. Its totient is φ = 1681008.

The previous prime is 2151497. The next prime is 2151509. The reversal of 2151505 is 5051512.

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

It is a cyclic number.

It is not a de Polignac number, because 2151505 - 2³ = 2151497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151509) 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, 4789 + ... + 5218.

It is an arithmetic number, because the mean of its divisors is an integer number (330264).

2^2151505 is an apocalyptic number.

It is an amenable number.

2151505 is a deficient number, since it is larger than the sum of its proper divisors (490607).

2151505 is a wasteful number, since it uses less digits than its factorization.

2151505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10055.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 2151505 is about 1466.8009408233. The cubic root of 2151505 is about 129.0963965104.

The spelling of 2151505 in words is "two million, one hundred fifty-one thousand, five hundred five".