221902497641 has 8 divisors (see below), whose sum is σ = 242556721344. Its totient is φ = 201328485520.

The previous prime is 221902497631. The next prime is 221902497653. The reversal of 221902497641 is 146794209122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221902497641 - 2¹⁰ = 221902496617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221902497611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20047106 + ... + 20058171.

It is an arithmetic number, because the mean of its divisors is an integer number (30319590168).

Almost surely, 2^221902497641 is an apocalyptic number.

It is an amenable number.

221902497641 is a deficient number, since it is larger than the sum of its proper divisors (20654223703).

221902497641 is a wasteful number, since it uses less digits than its factorization.

221902497641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40105791.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 221902497641 in words is "two hundred twenty-one billion, nine hundred two million, four hundred ninety-seven thousand, six hundred forty-one".