213103632 has 40 divisors (see below), whose sum is σ = 629164096. Its totient is φ = 60886656.

The previous prime is 213103613. The next prime is 213103643. The reversal of 213103632 is 236301312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 213103599 and 213103608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316783 + ... + 317454.

Almost surely, 2^213103632 is an apocalyptic number.

It is an amenable number.

213103632 is an abundant number, since it is smaller than the sum of its proper divisors (416060464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213103632 is a wasteful number, since it uses less digits than its factorization.

213103632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634255 (or 634249 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 213103632 is about 14598.0694614048. The cubic root of 213103632 is about 597.3061007240.

Adding to 213103632 its reverse (236301312), we get a palindrome (449404944).

It can be divided in two parts, 21310 and 3632, that added together give a palindrome (24942).

The spelling of 213103632 in words is "two hundred thirteen million, one hundred three thousand, six hundred thirty-two".