42215775 has 48 divisors (see below), whose sum is σ = 80375808. Its totient is φ = 19152000.

The previous prime is 42215759. The next prime is 42215791. The reversal of 42215775 is 57751224.

It is an interprime number because it is at equal distance from previous prime (42215759) and next prime (42215791).

It is not a de Polignac number, because 42215775 - 2⁴ = 42215759 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 100065 + ... + 100485.

It is an arithmetic number, because the mean of its divisors is an integer number (1674496).

Almost surely, 2^42215775 is an apocalyptic number.

42215775 is a deficient number, since it is larger than the sum of its proper divisors (38160033).

42215775 is a wasteful number, since it uses less digits than its factorization.

42215775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632 (or 627 counting only the distinct ones).

The product of its digits is 19600, while the sum is 33.

The square root of 42215775 is about 6497.3667743171. The cubic root of 42215775 is about 348.1969175521.

Adding to 42215775 its reverse (57751224), we get a palindrome (99966999).

The spelling of 42215775 in words is "forty-two million, two hundred fifteen thousand, seven hundred seventy-five".