42815827 has 2 divisors, whose sum is σ = 42815828. Its totient is φ = 42815826.

The previous prime is 42815821. The next prime is 42815833. The reversal of 42815827 is 72851824.

It is a balanced prime because it is at equal distance from previous prime (42815821) and next prime (42815833).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42815827 is a prime.

It is not a weakly prime, because it can be changed into another prime (42815821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21407913 + 21407914.

It is an arithmetic number, because the mean of its divisors is an integer number (21407914).

Almost surely, 2^42815827 is an apocalyptic number.

42815827 is a deficient number, since it is larger than the sum of its proper divisors (1).

42815827 is an equidigital number, since it uses as much as digits as its factorization.

42815827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35840, while the sum is 37.

The square root of 42815827 is about 6543.3803954837. The cubic root of 42815827 is about 349.8389109034.

The spelling of 42815827 in words is "forty-two million, eight hundred fifteen thousand, eight hundred twenty-seven".