42215226531 has 16 divisors (see below), whose sum is σ = 58112252928. Its totient is φ = 27231141600.

The previous prime is 42215226517. The next prime is 42215226569. The reversal of 42215226531 is 13562251224.

It is a happy number.

42215226531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42215226531 - 2¹⁵ = 42215193763 is a prime.

It is a super-2 number, since 2×42215226531² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42215226492 and 42215226501.

It is not an unprimeable number, because it can be changed into a prime (42215222531) 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, 585400 + ... + 653546.

It is an arithmetic number, because the mean of its divisors is an integer number (3632015808).

Almost surely, 2^42215226531 is an apocalyptic number.

42215226531 is a deficient number, since it is larger than the sum of its proper divisors (15897026397).

42215226531 is a wasteful number, since it uses less digits than its factorization.

42215226531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74842.

The product of its digits is 28800, while the sum is 33.

Adding to 42215226531 its reverse (13562251224), we get a palindrome (55777477755).

The spelling of 42215226531 in words is "forty-two billion, two hundred fifteen million, two hundred twenty-six thousand, five hundred thirty-one".