42550100 has 18 divisors (see below), whose sum is σ = 92333934. Its totient is φ = 17020000.

The previous prime is 42550061. The next prime is 42550121. The reversal of 42550100 is 105524.

It can be written as a sum of positive squares in 3 ways, for example, as 611524 + 41938576 = 782^2 + 6476^2 .

It is a super-2 number, since 2×42550100² = 3621022020020000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212651 + ... + 212850.

It is an arithmetic number, because the mean of its divisors is an integer number (5129663).

Almost surely, 2^42550100 is an apocalyptic number.

It is an amenable number.

42550100 is an abundant number, since it is smaller than the sum of its proper divisors (49783834).

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

42550100 is a wasteful number, since it uses less digits than its factorization.

42550100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425515 (or 425508 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 42550100 is about 6523.0437680580. The cubic root of 42550100 is about 349.1136757744.

Adding to 42550100 its reverse (105524), we get a palindrome (42655624).

The spelling of 42550100 in words is "forty-two million, five hundred fifty thousand, one hundred".