42215856 has 40 divisors (see below), whose sum is σ = 113802240. Its totient is φ = 13459776.

The previous prime is 42215837. The next prime is 42215861. The reversal of 42215856 is 65851224.

It is a super-3 number, since 3×42215856³ (a number of 24 digits) contains 333 as substring.

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, 18016 + ... + 20223.

It is an arithmetic number, because the mean of its divisors is an integer number (2845056).

Almost surely, 2^42215856 is an apocalyptic number.

42215856 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

42215856 is an abundant number, since it is smaller than the sum of its proper divisors (71586384).

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

42215856 is a wasteful number, since it uses less digits than its factorization.

42215856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38273 (or 38267 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 42215856 is about 6497.3730076085. The cubic root of 42215856 is about 348.1971402487.

It can be divided in two parts, 42215 and 856, that added together give a triangular number (43071 = T₂₉₃).

The spelling of 42215856 in words is "forty-two million, two hundred fifteen thousand, eight hundred fifty-six".