212115604 has 6 divisors (see below), whose sum is σ = 371202314. Its totient is φ = 106057800.

The previous prime is 212115587. The next prime is 212115611. The reversal of 212115604 is 406511212.

It can be written as a sum of positive squares in only one way, i.e., 182304004 + 29811600 = 13502^2 + 5460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26514447 + ... + 26514454.

Almost surely, 2^212115604 is an apocalyptic number.

It is an amenable number.

212115604 is a deficient number, since it is larger than the sum of its proper divisors (159086710).

212115604 is a wasteful number, since it uses less digits than its factorization.

212115604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53028905 (or 53028903 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 212115604 is about 14564.1890951745. The cubic root of 212115604 is about 596.3815590461.

Adding to 212115604 its reverse (406511212), we get a palindrome (618626816).

The spelling of 212115604 in words is "two hundred twelve million, one hundred fifteen thousand, six hundred four".