42520218 has 16 divisors (see below), whose sum is σ = 91582176. Its totient is φ = 13083120.

The previous prime is 42520217. The next prime is 42520259. The reversal of 42520218 is 81202524.

It is not an unprimeable number, because it can be changed into a prime (42520211) 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, 272488 + ... + 272643.

It is an arithmetic number, because the mean of its divisors is an integer number (5723886).

Almost surely, 2^42520218 is an apocalyptic number.

42520218 is an abundant number, since it is smaller than the sum of its proper divisors (49061958).

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

42520218 is a wasteful number, since it uses less digits than its factorization.

42520218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545149.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 42520218 is about 6520.7528706431. The cubic root of 42520218 is about 349.0319316820.

The spelling of 42520218 in words is "forty-two million, five hundred twenty thousand, two hundred eighteen".