2051523 has 6 divisors (see below), whose sum is σ = 2963324. Its totient is φ = 1367676.

The previous prime is 2051507. The next prime is 2051537. The reversal of 2051523 is 3251502.

It is a happy number.

It is not a de Polignac number, because 2051523 - 2⁴ = 2051507 is a prime.

It is a Duffinian number.

2051523 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2051496 and 2051505.

It is not an unprimeable number, because it can be changed into a prime (2051593) 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 5 ways as a sum of consecutive naturals, for example, 113965 + ... + 113982.

2^2051523 is an apocalyptic number.

2051523 is a deficient number, since it is larger than the sum of its proper divisors (911801).

2051523 is a wasteful number, since it uses less digits than its factorization.

2051523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227953 (or 227950 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2051523 is about 1432.3138622523. The cubic root of 2051523 is about 127.0648603326.

It can be divided in two parts, 205 and 1523, that added together give a cube (1728 = 12³).

The spelling of 2051523 in words is "two million, fifty-one thousand, five hundred twenty-three".