42470531 has 4 divisors (see below), whose sum is σ = 42488712. Its totient is φ = 42452352.

The previous prime is 42470521. The next prime is 42470551. The reversal of 42470531 is 13507424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42470531 is a prime.

It is a super-2 number, since 2×42470531² = 3607492006843922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42470531.

It is not an unprimeable number, because it can be changed into a prime (42470521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4961 + ... + 10466.

It is an arithmetic number, because the mean of its divisors is an integer number (10622178).

Almost surely, 2^42470531 is an apocalyptic number.

42470531 is a deficient number, since it is larger than the sum of its proper divisors (18181).

42470531 is a wasteful number, since it uses less digits than its factorization.

42470531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18180.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 42470531 is about 6516.9418441475. The cubic root of 42470531 is about 348.8959249388.

Adding to 42470531 its reverse (13507424), we get a palindrome (55977955).

The spelling of 42470531 in words is "forty-two million, four hundred seventy thousand, five hundred thirty-one".