42155983 has 2 divisors, whose sum is σ = 42155984. Its totient is φ = 42155982.

The previous prime is 42155957. The next prime is 42156011. The reversal of 42155983 is 38955124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42155983 - 2⁵ = 42155951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42155483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21077991 + 21077992.

It is an arithmetic number, because the mean of its divisors is an integer number (21077992).

Almost surely, 2^42155983 is an apocalyptic number.

42155983 is a deficient number, since it is larger than the sum of its proper divisors (1).

42155983 is an equidigital number, since it uses as much as digits as its factorization.

42155983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 37.

The square root of 42155983 is about 6492.7638952914. The cubic root of 42155983 is about 348.0324511730.

It can be divided in two parts, 42 and 155983, that added together give a square (156025 = 395²).

The spelling of 42155983 in words is "forty-two million, one hundred fifty-five thousand, nine hundred eighty-three".