1655231 has 2 divisors, whose sum is σ = 1655232. Its totient is φ = 1655230.

The previous prime is 1655209. The next prime is 1655237. The reversal of 1655231 is 1325561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1655231 - 2⁶ = 1655167 is a prime.

It is a super-2 number, since 2×1655231² = 5479579326722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1655197 and 1655206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827615 + 827616.

It is an arithmetic number, because the mean of its divisors is an integer number (827616).

2^1655231 is an apocalyptic number.

1655231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655231 is an equidigital number, since it uses as much as digits as its factorization.

1655231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 23.

The square root of 1655231 is about 1286.5578105938. The cubic root of 1655231 is about 118.2913179322.

The spelling of 1655231 in words is "one million, six hundred fifty-five thousand, two hundred thirty-one".