214143531 has 32 divisors (see below), whose sum is σ = 337075200. Its totient is φ = 118371456.

The previous prime is 214143499. The next prime is 214143541. The reversal of 214143531 is 135341412.

It is a happy number.

It is not a de Polignac number, because 214143531 - 2⁵ = 214143499 is a prime.

It is a super-2 number, since 2×214143531² = 91714903738295922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (214143541) 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 31 ways as a sum of consecutive naturals, for example, 152370 + ... + 153768.

It is an arithmetic number, because the mean of its divisors is an integer number (10533600).

Almost surely, 2^214143531 is an apocalyptic number.

214143531 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

214143531 is a deficient number, since it is larger than the sum of its proper divisors (122931669).

214143531 is a wasteful number, since it uses less digits than its factorization.

214143531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643.

The product of its digits is 1440, while the sum is 24.

The square root of 214143531 is about 14633.6438046031. The cubic root of 214143531 is about 598.2760989076.

Adding to 214143531 its reverse (135341412), we get a palindrome (349484943).

The spelling of 214143531 in words is "two hundred fourteen million, one hundred forty-three thousand, five hundred thirty-one".