212631772 has 12 divisors (see below), whose sum is σ = 377203456. Its totient is φ = 104859360.

The previous prime is 212631743. The next prime is 212631823. The reversal of 212631772 is 277136212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363804 + ... + 364387.

Almost surely, 2^212631772 is an apocalyptic number.

It is an amenable number.

212631772 is a deficient number, since it is larger than the sum of its proper divisors (164571684).

212631772 is a wasteful number, since it uses less digits than its factorization.

212631772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728268 (or 728266 counting only the distinct ones).

The product of its digits is 7056, while the sum is 31.

The square root of 212631772 is about 14581.8987789657. The cubic root of 212631772 is about 596.8649176664.

Adding to 212631772 its reverse (277136212), we get a palindrome (489767984).

The spelling of 212631772 in words is "two hundred twelve million, six hundred thirty-one thousand, seven hundred seventy-two".