42520220 has 24 divisors (see below), whose sum is σ = 92174208. Its totient is φ = 16459200.

The previous prime is 42520217. The next prime is 42520259. The reversal of 42520220 is 2202524.

It is a zygodrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33671 + ... + 34910.

It is an arithmetic number, because the mean of its divisors is an integer number (3840592).

Almost surely, 2^42520220 is an apocalyptic number.

It is an amenable number.

42520220 is an abundant number, since it is smaller than the sum of its proper divisors (49653988).

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

42520220 is a wasteful number, since it uses less digits than its factorization.

42520220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68621 (or 68619 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 42520220 is about 6520.7530239996. The cubic root of 42520220 is about 349.0319371544.

Adding to 42520220 its reverse (2202524), we get a palindrome (44722744).

The spelling of 42520220 in words is "forty-two million, five hundred twenty thousand, two hundred twenty".