213041537 has 2 divisors, whose sum is σ = 213041538. Its totient is φ = 213041536.

The previous prime is 213041533. The next prime is 213041557. The reversal of 213041537 is 735140312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130667761 + 82373776 = 11431^2 + 9076^2 .

It is a cyclic number.

It is not a de Polignac number, because 213041537 - 2² = 213041533 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213041533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106520768 + 106520769.

It is an arithmetic number, because the mean of its divisors is an integer number (106520769).

Almost surely, 2^213041537 is an apocalyptic number.

It is an amenable number.

213041537 is a deficient number, since it is larger than the sum of its proper divisors (1).

213041537 is an equidigital number, since it uses as much as digits as its factorization.

213041537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 213041537 is about 14595.9424841289. The cubic root of 213041537 is about 597.2480799307.

Adding to 213041537 its reverse (735140312), we get a palindrome (948181849).

The spelling of 213041537 in words is "two hundred thirteen million, forty-one thousand, five hundred thirty-seven".