2031545 has 4 divisors (see below), whose sum is σ = 2437860. Its totient is φ = 1625232.

The previous prime is 2031541. The next prime is 2031563. The reversal of 2031545 is 5451302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1352569 + 678976 = 1163^2 + 824^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031545 - 2² = 2031541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2031541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203150 + ... + 203159.

It is an arithmetic number, because the mean of its divisors is an integer number (609465).

2^2031545 is an apocalyptic number.

It is an amenable number.

2031545 is a deficient number, since it is larger than the sum of its proper divisors (406315).

2031545 is an equidigital number, since it uses as much as digits as its factorization.

2031545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406314.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2031545 is about 1425.3227704629. The cubic root of 2031545 is about 126.6510560941.

Adding to 2031545 its reverse (5451302), we get a palindrome (7482847).

The spelling of 2031545 in words is "two million, thirty-one thousand, five hundred forty-five".