213523012 has 6 divisors (see below), whose sum is σ = 373665278. Its totient is φ = 106761504.

The previous prime is 213522943. The next prime is 213523033. The reversal of 213523012 is 210325312.

It can be written as a sum of positive squares in only one way, i.e., 206037316 + 7485696 = 14354^2 + 2736^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26690373 + ... + 26690380.

Almost surely, 2^213523012 is an apocalyptic number.

It is an amenable number.

213523012 is a deficient number, since it is larger than the sum of its proper divisors (160142266).

213523012 is a wasteful number, since it uses less digits than its factorization.

213523012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53380757 (or 53380755 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 213523012 is about 14612.4266294137. The cubic root of 213523012 is about 597.6976693486.

Adding to 213523012 its reverse (210325312), we get a palindrome (423848324).

The spelling of 213523012 in words is "two hundred thirteen million, five hundred twenty-three thousand, twelve".