2157473 has 4 divisors (see below), whose sum is σ = 2170560. Its totient is φ = 2144388.

The previous prime is 2157457. The next prime is 2157481. The reversal of 2157473 is 3747512.

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 2157473 - 2⁴ = 2157457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157413) 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, 6293 + ... + 6626.

It is an arithmetic number, because the mean of its divisors is an integer number (542640).

2^2157473 is an apocalyptic number.

It is an amenable number.

2157473 is a deficient number, since it is larger than the sum of its proper divisors (13087).

2157473 is a wasteful number, since it uses less digits than its factorization.

2157473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13086.

The product of its digits is 5880, while the sum is 29.

The square root of 2157473 is about 1468.8338912212. The cubic root of 2157473 is about 129.2156519488.

The spelling of 2157473 in words is "two million, one hundred fifty-seven thousand, four hundred seventy-three".