42455550 has 48 divisors (see below), whose sum is σ = 105707520. Its totient is φ = 11276640.

The previous prime is 42455537. The next prime is 42455551. The reversal of 42455550 is 5555424.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42455551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57081 + ... + 57819.

It is an arithmetic number, because the mean of its divisors is an integer number (2202240).

Almost surely, 2^42455550 is an apocalyptic number.

42455550 is an abundant number, since it is smaller than the sum of its proper divisors (63251970).

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

42455550 is a wasteful number, since it uses less digits than its factorization.

42455550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 42455550 is about 6515.7923539659. The cubic root of 42455550 is about 348.8548970825.

The spelling of 42455550 in words is "forty-two million, four hundred fifty-five thousand, five hundred fifty".