2151573 has 4 divisors (see below), whose sum is σ = 2868768. Its totient is φ = 1434380.

The previous prime is 2151563. The next prime is 2151593. The reversal of 2151573 is 3751512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2151573 - 2⁶ = 2151509 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151533) 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, 358593 + ... + 358598.

It is an arithmetic number, because the mean of its divisors is an integer number (717192).

2^2151573 is an apocalyptic number.

It is an amenable number.

2151573 is a deficient number, since it is larger than the sum of its proper divisors (717195).

2151573 is an equidigital number, since it uses as much as digits as its factorization.

2151573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717194.

The product of its digits is 1050, while the sum is 24.

The square root of 2151573 is about 1466.8241203362. The cubic root of 2151573 is about 129.0977565603.

The spelling of 2151573 in words is "two million, one hundred fifty-one thousand, five hundred seventy-three".