221979062 has 4 divisors (see below), whose sum is σ = 332968596. Its totient is φ = 110989530.

The previous prime is 221979053. The next prime is 221979119. The reversal of 221979062 is 260979122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 260979122 = 2 ⋅130489561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55494764 + ... + 55494767.

It is an arithmetic number, because the mean of its divisors is an integer number (83242149).

Almost surely, 2^221979062 is an apocalyptic number.

221979062 is a deficient number, since it is larger than the sum of its proper divisors (110989534).

221979062 is a wasteful number, since it uses less digits than its factorization.

221979062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110989533.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 221979062 is about 14898.9617759091. The cubic root of 221979062 is about 605.4858579243.

The spelling of 221979062 in words is "two hundred twenty-one million, nine hundred seventy-nine thousand, sixty-two".