213651633 has 16 divisors (see below), whose sum is σ = 307048896. Its totient is φ = 131363520.

The previous prime is 213651601. The next prime is 213651643. The reversal of 213651633 is 336156312.

It is a happy number.

It is not a de Polignac number, because 213651633 - 2⁵ = 213651601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213651633.

It is not an unprimeable number, because it can be changed into a prime (213651643) 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, 73891 + ... + 76727.

It is an arithmetic number, because the mean of its divisors is an integer number (19190556).

Almost surely, 2^213651633 is an apocalyptic number.

It is an amenable number.

213651633 is a deficient number, since it is larger than the sum of its proper divisors (93397263).

213651633 is a wasteful number, since it uses less digits than its factorization.

213651633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4784.

The product of its digits is 9720, while the sum is 30.

The square root of 213651633 is about 14616.8270496712. The cubic root of 213651633 is about 597.8176580408.

The spelling of 213651633 in words is "two hundred thirteen million, six hundred fifty-one thousand, six hundred thirty-three".