213403031 has 2 divisors, whose sum is σ = 213403032. Its totient is φ = 213403030.

The previous prime is 213403019. The next prime is 213403033. The reversal of 213403031 is 130304312.

It is a happy number.

213403031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213403031 - 2¹⁴ = 213386647 is a prime.

It is a super-2 number, since 2×213403031² = 91081707279973922, which contains 22 as substring.

Together with 213403033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213403033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106701515 + 106701516.

It is an arithmetic number, because the mean of its divisors is an integer number (106701516).

Almost surely, 2^213403031 is an apocalyptic number.

213403031 is a deficient number, since it is larger than the sum of its proper divisors (1).

213403031 is an equidigital number, since it uses as much as digits as its factorization.

213403031 is an evil number, because the sum of its binary digits is even.

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

The square root of 213403031 is about 14608.3206084752. The cubic root of 213403031 is about 597.5856973421.

Adding to 213403031 its reverse (130304312), we get a palindrome (343707343).

The spelling of 213403031 in words is "two hundred thirteen million, four hundred three thousand, thirty-one".