2155499 has 2 divisors, whose sum is σ = 2155500. Its totient is φ = 2155498.

The previous prime is 2155487. The next prime is 2155511. The reversal of 2155499 is 9945512.

It is a balanced prime because it is at equal distance from previous prime (2155487) and next prime (2155511).

It is a cyclic number.

It is not a de Polignac number, because 2155499 - 2¹² = 2151403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2155409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077749 + 1077750.

It is an arithmetic number, because the mean of its divisors is an integer number (1077750).

2^2155499 is an apocalyptic number.

2155499 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155499 is an equidigital number, since it uses as much as digits as its factorization.

2155499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 35.

The square root of 2155499 is about 1468.1617758272. The cubic root of 2155499 is about 129.1762309024.

The spelling of 2155499 in words is "two million, one hundred fifty-five thousand, four hundred ninety-nine".