214242531 has 4 divisors (see below), whose sum is σ = 285656712. Its totient is φ = 142828352.

The previous prime is 214242529. The next prime is 214242541. The reversal of 214242531 is 135242412.

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 214242531 - 2¹ = 214242529 is a prime.

It is a super-2 number, since 2×214242531² = 91799724178571922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (214242521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35707086 + ... + 35707091.

It is an arithmetic number, because the mean of its divisors is an integer number (71414178).

Almost surely, 2^214242531 is an apocalyptic number.

214242531 is a deficient number, since it is larger than the sum of its proper divisors (71414181).

214242531 is an equidigital number, since it uses as much as digits as its factorization.

214242531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71414180.

The product of its digits is 1920, while the sum is 24.

The square root of 214242531 is about 14637.0260299010. The cubic root of 214242531 is about 598.3682803968.

Adding to 214242531 its reverse (135242412), we get a palindrome (349484943).

The spelling of 214242531 in words is "two hundred fourteen million, two hundred forty-two thousand, five hundred thirty-one".