221463652 has 6 divisors (see below), whose sum is σ = 387561398. Its totient is φ = 110731824.

The previous prime is 221463643. The next prime is 221463653. The reversal of 221463652 is 256364122.

It can be written as a sum of positive squares in only one way, i.e., 204604416 + 16859236 = 14304^2 + 4106^2 .

It is a super-2 number, since 2×221463652² = 98092298314354208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221463653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27682953 + ... + 27682960.

Almost surely, 2^221463652 is an apocalyptic number.

It is an amenable number.

221463652 is a deficient number, since it is larger than the sum of its proper divisors (166097746).

221463652 is a wasteful number, since it uses less digits than its factorization.

221463652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55365917 (or 55365915 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 221463652 is about 14881.6548810944. The cubic root of 221463652 is about 605.0168717832.

The spelling of 221463652 in words is "two hundred twenty-one million, four hundred sixty-three thousand, six hundred fifty-two".