2155423 has 2 divisors, whose sum is σ = 2155424. Its totient is φ = 2155422.

The previous prime is 2155409. The next prime is 2155429. The reversal of 2155423 is 3245512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2155423 - 2¹³ = 2147231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2155394 and 2155403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077711 + 1077712.

It is an arithmetic number, because the mean of its divisors is an integer number (1077712).

2^2155423 is an apocalyptic number.

2155423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155423 is an equidigital number, since it uses as much as digits as its factorization.

2155423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 22.

The square root of 2155423 is about 1468.1358928928. The cubic root of 2155423 is about 129.1747126911.

The spelling of 2155423 in words is "two million, one hundred fifty-five thousand, four hundred twenty-three".