213154633 has 2 divisors, whose sum is σ = 213154634. Its totient is φ = 213154632.

The previous prime is 213154631. The next prime is 213154657. The reversal of 213154633 is 336451312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163635264 + 49519369 = 12792^2 + 7037^2 .

It is a cyclic number.

It is not a de Polignac number, because 213154633 - 2¹ = 213154631 is a prime.

Together with 213154631, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (213154631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106577316 + 106577317.

It is an arithmetic number, because the mean of its divisors is an integer number (106577317).

Almost surely, 2^213154633 is an apocalyptic number.

It is an amenable number.

213154633 is a deficient number, since it is larger than the sum of its proper divisors (1).

213154633 is an equidigital number, since it uses as much as digits as its factorization.

213154633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

The square root of 213154633 is about 14599.8161974732. The cubic root of 213154633 is about 597.3537469924.

It can be divided in two parts, 213 and 154633, that added together give a triangular number (154846 = T₅₅₆).

The spelling of 213154633 in words is "two hundred thirteen million, one hundred fifty-four thousand, six hundred thirty-three".