42531011 has 4 divisors (see below), whose sum is σ = 42688224. Its totient is φ = 42373800.

The previous prime is 42530989. The next prime is 42531017. The reversal of 42531011 is 11013524.

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

It is a cyclic number.

It is not a de Polignac number, because 42531011 - 2¹⁴ = 42514627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42531017) 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, 78200 + ... + 78741.

It is an arithmetic number, because the mean of its divisors is an integer number (10672056).

Almost surely, 2^42531011 is an apocalyptic number.

42531011 is a deficient number, since it is larger than the sum of its proper divisors (157213).

42531011 is a wasteful number, since it uses less digits than its factorization.

42531011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157212.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 42531011 is about 6521.5804066192. The cubic root of 42531011 is about 349.0614610301.

Adding to 42531011 its reverse (11013524), we get a palindrome (53544535).

The spelling of 42531011 in words is "forty-two million, five hundred thirty-one thousand, eleven".