42215415 has 16 divisors (see below), whose sum is σ = 73685376. Its totient is φ = 20468000.

The previous prime is 42215413. The next prime is 42215423. The reversal of 42215415 is 51451224.

It is not a de Polignac number, because 42215415 - 2¹ = 42215413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42215413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127761 + ... + 128090.

It is an arithmetic number, because the mean of its divisors is an integer number (4605336).

Almost surely, 2^42215415 is an apocalyptic number.

42215415 is a deficient number, since it is larger than the sum of its proper divisors (31469961).

42215415 is a wasteful number, since it uses less digits than its factorization.

42215415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255870.

The product of its digits is 1600, while the sum is 24.

The square root of 42215415 is about 6497.3390707273. The cubic root of 42215415 is about 348.1959277858.

Adding to 42215415 its reverse (51451224), we get a palindrome (93666639).

The spelling of 42215415 in words is "forty-two million, two hundred fifteen thousand, four hundred fifteen".