221430038 has 4 divisors (see below), whose sum is σ = 332145060. Its totient is φ = 110715018.

The previous prime is 221430037. The next prime is 221430059. The reversal of 221430038 is 830034122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 830034122 = 2 ⋅415017061.

It is a junction number, because it is equal to n+sod(n) for n = 221429995 and 221430022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221430037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55357508 + ... + 55357511.

It is an arithmetic number, because the mean of its divisors is an integer number (83036265).

Almost surely, 2^221430038 is an apocalyptic number.

221430038 is a deficient number, since it is larger than the sum of its proper divisors (110715022).

221430038 is a wasteful number, since it uses less digits than its factorization.

221430038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110715021.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 221430038 is about 14880.5254611522. The cubic root of 221430038 is about 604.9862601893.

The spelling of 221430038 in words is "two hundred twenty-one million, four hundred thirty thousand, thirty-eight".