213121463 has 2 divisors, whose sum is σ = 213121464. Its totient is φ = 213121462.

The previous prime is 213121457. The next prime is 213121471. The reversal of 213121463 is 364121312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213121463 - 2⁶ = 213121399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213120463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106560731 + 106560732.

It is an arithmetic number, because the mean of its divisors is an integer number (106560732).

Almost surely, 2^213121463 is an apocalyptic number.

213121463 is a deficient number, since it is larger than the sum of its proper divisors (1).

213121463 is an equidigital number, since it uses as much as digits as its factorization.

213121463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 213121463 is about 14598.6801800711. The cubic root of 213121463 is about 597.3227597050.

Adding to 213121463 its reverse (364121312), we get a palindrome (577242775).

The spelling of 213121463 in words is "two hundred thirteen million, one hundred twenty-one thousand, four hundred sixty-three".