221656430143374 has 32 divisors (see below), whose sum is σ = 453356351650080. Its totient is φ = 72221926288512.

The previous prime is 221656430143303. The next prime is 221656430143403. The reversal of 221656430143374 is 473341034656122.

It is a super-2 number, since 2×221656430143374² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1295514457 + ... + 1295685540.

It is an arithmetic number, because the mean of its divisors is an integer number (14167385989065).

Almost surely, 2^{221656430143374} is an apocalyptic number.

221656430143374 is an abundant number, since it is smaller than the sum of its proper divisors (231699921506706).

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

221656430143374 is a wasteful number, since it uses less digits than its factorization.

221656430143374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591200324.

The product of its (nonzero) digits is 8709120, while the sum is 51.

Adding to 221656430143374 its reverse (473341034656122), we get a palindrome (694997464799496).

The spelling of 221656430143374 in words is "two hundred twenty-one trillion, six hundred fifty-six billion, four hundred thirty million, one hundred forty-three thousand, three hundred seventy-four".