42643155 has 32 divisors (see below), whose sum is σ = 69954048. Its totient is φ = 22176000.

The previous prime is 42643141. The next prime is 42643187. The reversal of 42643155 is 55134624.

It is not a de Polignac number, because 42643155 - 2¹⁵ = 42610387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151615 + ... + 151895.

It is an arithmetic number, because the mean of its divisors is an integer number (2186064).

Almost surely, 2^42643155 is an apocalyptic number.

42643155 is a deficient number, since it is larger than the sum of its proper divisors (27310893).

42643155 is a wasteful number, since it uses less digits than its factorization.

42643155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507.

The product of its digits is 14400, while the sum is 30.

The square root of 42643155 is about 6530.1726623421. The cubic root of 42643155 is about 349.3679886864.

Adding to 42643155 its reverse (55134624), we get a palindrome (97777779).

The spelling of 42643155 in words is "forty-two million, six hundred forty-three thousand, one hundred fifty-five".