221240046351 has 16 divisors (see below), whose sum is σ = 301997336960. Its totient is φ = 143991479520.

The previous prime is 221240046347. The next prime is 221240046353. The reversal of 221240046351 is 153640042122.

It is not a de Polignac number, because 221240046351 - 2² = 221240046347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221240046353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166996 + ... + 685833.

It is an arithmetic number, because the mean of its divisors is an integer number (18874833560).

Almost surely, 2^221240046351 is an apocalyptic number.

221240046351 is a deficient number, since it is larger than the sum of its proper divisors (80757290609).

221240046351 is a wasteful number, since it uses less digits than its factorization.

221240046351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854886.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 221240046351 its reverse (153640042122), we get a palindrome (374880088473).

The spelling of 221240046351 in words is "two hundred twenty-one billion, two hundred forty million, forty-six thousand, three hundred fifty-one".