42155210 has 16 divisors (see below), whose sum is σ = 77930856. Its totient is φ = 16406208.

The previous prime is 42155203. The next prime is 42155213. The reversal of 42155210 is 1255124.

It can be written as a sum of positive squares in 4 ways, for example, as 41357761 + 797449 = 6431^2 + 893^2 .

It is not an unprimeable number, because it can be changed into a prime (42155213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56597 + ... + 57336.

Almost surely, 2^42155210 is an apocalyptic number.

42155210 is a deficient number, since it is larger than the sum of its proper divisors (35775646).

42155210 is a wasteful number, since it uses less digits than its factorization.

42155210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113977.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 42155210 is about 6492.7043672109. The cubic root of 42155210 is about 348.0303239089.

The spelling of 42155210 in words is "forty-two million, one hundred fifty-five thousand, two hundred ten".