221134051 has 4 divisors (see below), whose sum is σ = 222875392. Its totient is φ = 219392712.

The previous prime is 221134037. The next prime is 221134057. The reversal of 221134051 is 150431122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221134051 - 2⁷ = 221133923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221134057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870480 + ... + 870733.

It is an arithmetic number, because the mean of its divisors is an integer number (55718848).

Almost surely, 2^221134051 is an apocalyptic number.

221134051 is a deficient number, since it is larger than the sum of its proper divisors (1741341).

221134051 is a wasteful number, since it uses less digits than its factorization.

221134051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741340.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 221134051 is about 14870.5766868673. The cubic root of 221134051 is about 604.7165769427.

Adding to 221134051 its reverse (150431122), we get a palindrome (371565173).

The spelling of 221134051 in words is "two hundred twenty-one million, one hundred thirty-four thousand, fifty-one".