42155512 has 32 divisors (see below), whose sum is σ = 95649120. Its totient is φ = 17003520.

The previous prime is 42155507. The next prime is 42155513. The reversal of 42155512 is 21555124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42155513) 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, 21189 + ... + 23092.

It is an arithmetic number, because the mean of its divisors is an integer number (2989035).

Almost surely, 2^42155512 is an apocalyptic number.

It is an amenable number.

42155512 is an abundant number, since it is smaller than the sum of its proper divisors (53493608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42155512 is a wasteful number, since it uses less digits than its factorization.

42155512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44311 (or 44307 counting only the distinct ones).

The product of its digits is 2000, while the sum is 25.

The square root of 42155512 is about 6492.7276240421. The cubic root of 42155512 is about 348.0311550035.

The spelling of 42155512 in words is "forty-two million, one hundred fifty-five thousand, five hundred twelve".