213801633 has 16 divisors (see below), whose sum is σ = 324111040. Its totient is φ = 139218912.

The previous prime is 213801631. The next prime is 213801649. The reversal of 213801633 is 336108312.

213801633 = T₂₂₅₇ + T₂₂₅₈ + ... + T₂₃₃₇.

It is a happy number.

213801633 is a `hidden beast` number, since 21 + 3 + 8 + 0 + 1 + 633 = 666.

It is not a de Polignac number, because 213801633 - 2¹ = 213801631 is a prime.

It is a super-2 number, since 2×213801633² = 91422276546933378, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213801597 and 213801606.

It is not an unprimeable number, because it can be changed into a prime (213801631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90916 + ... + 93237.

It is an arithmetic number, because the mean of its divisors is an integer number (20256940).

Almost surely, 2^213801633 is an apocalyptic number.

It is an amenable number.

213801633 is a deficient number, since it is larger than the sum of its proper divisors (110309407).

213801633 is a wasteful number, since it uses less digits than its factorization.

213801633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184205 (or 184199 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 213801633 is about 14621.9572219317. The cubic root of 213801633 is about 597.9575300838.

Adding to 213801633 its reverse (336108312), we get a palindrome (549909945).

The spelling of 213801633 in words is "two hundred thirteen million, eight hundred one thousand, six hundred thirty-three".