213430037 has 2 divisors, whose sum is σ = 213430038. Its totient is φ = 213430036.

The previous prime is 213430013. The next prime is 213430057. The reversal of 213430037 is 730034312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184796836 + 28633201 = 13594^2 + 5351^2 .

It is a cyclic number.

It is not a de Polignac number, because 213430037 - 2²⁰ = 212381461 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213429994 and 213430021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213430057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106715018 + 106715019.

It is an arithmetic number, because the mean of its divisors is an integer number (106715019).

Almost surely, 2^213430037 is an apocalyptic number.

It is an amenable number.

213430037 is a deficient number, since it is larger than the sum of its proper divisors (1).

213430037 is an equidigital number, since it uses as much as digits as its factorization.

213430037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 213430037 is about 14609.2449154636. The cubic root of 213430037 is about 597.6109042921.

Adding to 213430037 its reverse (730034312), we get a palindrome (943464349).

The spelling of 213430037 in words is "two hundred thirteen million, four hundred thirty thousand, thirty-seven".