42212415 has 16 divisors (see below), whose sum is σ = 77188608. Its totient is φ = 19297056.

The previous prime is 42212413. The next prime is 42212431. The reversal of 42212415 is 51421224.

It is not a de Polignac number, because 42212415 - 2¹ = 42212413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 42212391 and 42212400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42212413) 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, 200907 + ... + 201116.

It is an arithmetic number, because the mean of its divisors is an integer number (4824288).

Almost surely, 2^42212415 is an apocalyptic number.

42212415 is a deficient number, since it is larger than the sum of its proper divisors (34976193).

42212415 is a wasteful number, since it uses less digits than its factorization.

42212415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402038.

The product of its digits is 640, while the sum is 21.

The square root of 42212415 is about 6497.1082028853. The cubic root of 42212415 is about 348.1876795150.

Adding to 42212415 its reverse (51421224), we get a palindrome (93633639).

The spelling of 42212415 in words is "forty-two million, two hundred twelve thousand, four hundred fifteen".