221652942936 has 64 divisors (see below), whose sum is σ = 588419614080. Its totient is φ = 69337735680.

The previous prime is 221652942911. The next prime is 221652942977. The reversal of 221652942936 is 639249256122.

It is a happy number.

It is a super-2 number, since 2×221652942936² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 641230 + ... + 924381.

It is an arithmetic number, because the mean of its divisors is an integer number (9194056470).

Almost surely, 2^221652942936 is an apocalyptic number.

It is an amenable number.

221652942936 is an abundant number, since it is smaller than the sum of its proper divisors (366766671144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221652942936 is a wasteful number, since it uses less digits than its factorization.

221652942936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565984 (or 1565980 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 51.

The spelling of 221652942936 in words is "two hundred twenty-one billion, six hundred fifty-two million, nine hundred forty-two thousand, nine hundred thirty-six".