221551034 has 4 divisors (see below), whose sum is σ = 332326554. Its totient is φ = 110775516.

The previous prime is 221551009. The next prime is 221551061. The reversal of 221551034 is 430155122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 430155122 = 2 ⋅215077561.

It can be written as a sum of positive squares in only one way, i.e., 139594225 + 81956809 = 11815^2 + 9053^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55387757 + ... + 55387760.

Almost surely, 2^221551034 is an apocalyptic number.

221551034 is a deficient number, since it is larger than the sum of its proper divisors (110775520).

221551034 is a wasteful number, since it uses less digits than its factorization.

221551034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110775519.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 221551034 is about 14884.5904881525. The cubic root of 221551034 is about 605.0964343240.

The spelling of 221551034 in words is "two hundred twenty-one million, five hundred fifty-one thousand, thirty-four".