2051655 has 8 divisors (see below), whose sum is σ = 3282672. Its totient is φ = 1094208.

The previous prime is 2051653. The next prime is 2051671. The reversal of 2051655 is 5561502.

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

It is not a de Polignac number, because 2051655 - 2¹ = 2051653 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051653) 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, 68374 + ... + 68403.

It is an arithmetic number, because the mean of its divisors is an integer number (410334).

2^2051655 is an apocalyptic number.

2051655 is a deficient number, since it is larger than the sum of its proper divisors (1231017).

2051655 is a wasteful number, since it uses less digits than its factorization.

2051655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136785.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 2051655 is about 1432.3599407970. The cubic root of 2051655 is about 127.0675854953.

The spelling of 2051655 in words is "two million, fifty-one thousand, six hundred fifty-five".