213043031 has 16 divisors (see below), whose sum is σ = 229003200. Its totient is φ = 197491200.

The previous prime is 213043001. The next prime is 213043063. The reversal of 213043031 is 130340312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 213043031 - 2⁶ = 213042967 is a prime.

It is a super-2 number, since 2×213043031² = 90774666115333922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213043001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382205 + ... + 382761.

It is an arithmetic number, because the mean of its divisors is an integer number (14312700).

Almost surely, 2^213043031 is an apocalyptic number.

213043031 is a deficient number, since it is larger than the sum of its proper divisors (15960169).

213043031 is a wasteful number, since it uses less digits than its factorization.

213043031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 213043031 is about 14595.9936626459. The cubic root of 213043031 is about 597.2494760380.

Adding to 213043031 its reverse (130340312), we get a palindrome (343383343).

The spelling of 213043031 in words is "two hundred thirteen million, forty-three thousand, thirty-one".