42215454 has 96 divisors (see below), whose sum is σ = 104626080. Its totient is φ = 12220416.

The previous prime is 42215449. The next prime is 42215479. The reversal of 42215454 is 45451224.

It is a super-2 number, since 2×42215454² = 3564289112852232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 308074 + ... + 308210.

It is an arithmetic number, because the mean of its divisors is an integer number (1089855).

Almost surely, 2^42215454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42215454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52313040).

42215454 is an abundant number, since it is smaller than the sum of its proper divisors (62410626).

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

42215454 is a wasteful number, since it uses less digits than its factorization.

42215454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 231 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 42215454 is about 6497.3420719553. The cubic root of 42215454 is about 348.1960350108.

Adding to 42215454 its reverse (45451224), we get a palindrome (87666678).

It can be divided in two parts, 422 and 15454, that added together give a square (15876 = 126²).

The spelling of 42215454 in words is "forty-two million, two hundred fifteen thousand, four hundred fifty-four".