42215527 has 4 divisors (see below), whose sum is σ = 43245216. Its totient is φ = 41185840.

The previous prime is 42215513. The next prime is 42215531. The reversal of 42215527 is 72551224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42215527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42215495 and 42215504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42215027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514783 + ... + 514864.

It is an arithmetic number, because the mean of its divisors is an integer number (10811304).

Almost surely, 2^42215527 is an apocalyptic number.

42215527 is a deficient number, since it is larger than the sum of its proper divisors (1029689).

42215527 is a wasteful number, since it uses less digits than its factorization.

42215527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029688.

The product of its digits is 5600, while the sum is 28.

The square root of 42215527 is about 6497.3476896346. The cubic root of 42215527 is about 348.1962357137.

The spelling of 42215527 in words is "forty-two million, two hundred fifteen thousand, five hundred twenty-seven".