221992356863 has 8 divisors (see below), whose sum is σ = 223179791616. Its totient is φ = 220808035800.

The previous prime is 221992356851. The next prime is 221992356877. The reversal of 221992356863 is 368653299122.

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 221992356863 - 2¹⁸ = 221992094719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221992356799 and 221992356808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221992350863) 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, 635381 + ... + 920702.

It is an arithmetic number, because the mean of its divisors is an integer number (27897473952).

Almost surely, 2^221992356863 is an apocalyptic number.

221992356863 is a deficient number, since it is larger than the sum of its proper divisors (1187434753).

221992356863 is a wasteful number, since it uses less digits than its factorization.

221992356863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556845.

The product of its digits is 8398080, while the sum is 56.

The spelling of 221992356863 in words is "two hundred twenty-one billion, nine hundred ninety-two million, three hundred fifty-six thousand, eight hundred sixty-three".