212531432 has 8 divisors (see below), whose sum is σ = 398496450. Its totient is φ = 106265712.

The previous prime is 212531383. The next prime is 212531447. The reversal of 212531432 is 234135212.

It can be written as a sum of positive squares in only one way, i.e., 169156036 + 43375396 = 13006^2 + 6586^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 212531398 and 212531407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13283207 + ... + 13283222.

Almost surely, 2^212531432 is an apocalyptic number.

It is an amenable number.

212531432 is a deficient number, since it is larger than the sum of its proper divisors (185965018).

212531432 is a wasteful number, since it uses less digits than its factorization.

212531432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26566435 (or 26566431 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 212531432 is about 14578.4578059546. The cubic root of 212531432 is about 596.7710169160.

Adding to 212531432 its reverse (234135212), we get a palindrome (446666644).

The spelling of 212531432 in words is "two hundred twelve million, five hundred thirty-one thousand, four hundred thirty-two".