213434031 has 16 divisors (see below), whose sum is σ = 301882464. Its totient is φ = 133668864.

The previous prime is 213434029. The next prime is 213434033. The reversal of 213434031 is 130434312.

It is an interprime number because it is at equal distance from previous prime (213434029) and next prime (213434033).

It is not a de Polignac number, because 213434031 - 2¹ = 213434029 is a prime.

It is a super-2 number, since 2×213434031² = 91108171177817922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213433989 and 213434007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213434033) 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, 25801 + ... + 33053.

It is an arithmetic number, because the mean of its divisors is an integer number (18867654).

Almost surely, 2^213434031 is an apocalyptic number.

213434031 is a deficient number, since it is larger than the sum of its proper divisors (88448433).

213434031 is a wasteful number, since it uses less digits than its factorization.

213434031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7850.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 213434031 is about 14609.3816090894. The cubic root of 213434031 is about 597.6146320446.

Adding to 213434031 its reverse (130434312), we get a palindrome (343868343).

The spelling of 213434031 in words is "two hundred thirteen million, four hundred thirty-four thousand, thirty-one".