214231531 has 2 divisors, whose sum is σ = 214231532. Its totient is φ = 214231530.

The previous prime is 214231487. The next prime is 214231559. The reversal of 214231531 is 135132412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 214231531 - 2⁹ = 214231019 is a prime.

It is a super-2 number, since 2×214231531² = 91790297749207922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (214201531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107115765 + 107115766.

It is an arithmetic number, because the mean of its divisors is an integer number (107115766).

Almost surely, 2^214231531 is an apocalyptic number.

214231531 is a deficient number, since it is larger than the sum of its proper divisors (1).

214231531 is an equidigital number, since it uses as much as digits as its factorization.

214231531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 214231531 is about 14636.6502656858. The cubic root of 214231531 is about 598.3580394116.

Adding to 214231531 its reverse (135132412), we get a palindrome (349363943).

The spelling of 214231531 in words is "two hundred fourteen million, two hundred thirty-one thousand, five hundred thirty-one".