221362436 has 12 divisors (see below), whose sum is σ = 388362828. Its totient is φ = 110401632.

The previous prime is 221362363. The next prime is 221362469. The reversal of 221362436 is 634263122.

It can be written as a sum of positive squares in 2 ways, for example, as 95922436 + 125440000 = 9794^2 + 11200^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221362399 and 221362408.

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, 68111 + ... + 71286.

It is an arithmetic number, because the mean of its divisors is an integer number (32363569).

Almost surely, 2^221362436 is an apocalyptic number.

It is an amenable number.

221362436 is a deficient number, since it is larger than the sum of its proper divisors (167000392).

221362436 is a wasteful number, since it uses less digits than its factorization.

221362436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139798 (or 139796 counting only the distinct ones).

The product of its digits is 10368, while the sum is 29.

The square root of 221362436 is about 14878.2537953888. The cubic root of 221362436 is about 604.9246870256.

The spelling of 221362436 in words is "two hundred twenty-one million, three hundred sixty-two thousand, four hundred thirty-six".