2156473 has 4 divisors (see below), whose sum is σ = 2352528. Its totient is φ = 1960420.

The previous prime is 2156461. The next prime is 2156491. The reversal of 2156473 is 3746512.

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 not a de Polignac number, because 2156473 - 2⁹ = 2155961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156873) 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, 98011 + ... + 98032.

It is an arithmetic number, because the mean of its divisors is an integer number (588132).

2^2156473 is an apocalyptic number.

It is an amenable number.

2156473 is a deficient number, since it is larger than the sum of its proper divisors (196055).

2156473 is a wasteful number, since it uses less digits than its factorization.

2156473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196054.

The product of its digits is 5040, while the sum is 28.

The square root of 2156473 is about 1468.4934456783. The cubic root of 2156473 is about 129.1956848204.

The spelling of 2156473 in words is "two million, one hundred fifty-six thousand, four hundred seventy-three".