42655331 has 2 divisors, whose sum is σ = 42655332. Its totient is φ = 42655330.

The previous prime is 42655279. The next prime is 42655369. The reversal of 42655331 is 13355624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42655331 - 2¹⁰ = 42654307 is a prime.

It is a super-2 number, since 2×42655331² = 3638954525439122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42655294 and 42655303.

It is not a weakly prime, because it can be changed into another prime (42655391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21327665 + 21327666.

It is an arithmetic number, because the mean of its divisors is an integer number (21327666).

Almost surely, 2^42655331 is an apocalyptic number.

42655331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42655331 is an equidigital number, since it uses as much as digits as its factorization.

42655331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 29.

The square root of 42655331 is about 6531.1048835553. The cubic root of 42655331 is about 349.4012374756.

The spelling of 42655331 in words is "forty-two million, six hundred fifty-five thousand, three hundred thirty-one".