2157023 has 8 divisors (see below), whose sum is σ = 2370000. Its totient is φ = 1946880.

The previous prime is 2157017. The next prime is 2157031. The reversal of 2157023 is 3207512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2157023 - 2⁴ = 2157007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2156986 and 2157004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1103 + ... + 2351.

It is an arithmetic number, because the mean of its divisors is an integer number (296250).

2^2157023 is an apocalyptic number.

2157023 is a deficient number, since it is larger than the sum of its proper divisors (212977).

2157023 is a wasteful number, since it uses less digits than its factorization.

2157023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 2157023 is about 1468.6807004928. The cubic root of 2157023 is about 129.2066675047.

The spelling of 2157023 in words is "two million, one hundred fifty-seven thousand, twenty-three".