2051023 has 4 divisors (see below), whose sum is σ = 2208808. Its totient is φ = 1893240.

The previous prime is 2050987. The next prime is 2051041. The reversal of 2051023 is 3201502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2051023 - 2⁹ = 2050511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 157771 = 2051023 / (2 + 0 + 5 + 1 + 0 + 2 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2050994 and 2051012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78873 + ... + 78898.

It is an arithmetic number, because the mean of its divisors is an integer number (552202).

2^2051023 is an apocalyptic number.

2051023 is a deficient number, since it is larger than the sum of its proper divisors (157785).

2051023 is a wasteful number, since it uses less digits than its factorization.

2051023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157784.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 2051023 is about 1432.1393088663. The cubic root of 2051023 is about 127.0545366865.

Adding to 2051023 its reverse (3201502), we get a palindrome (5252525).

The spelling of 2051023 in words is "two million, fifty-one thousand, twenty-three".