221054051 has 4 divisors (see below), whose sum is σ = 221145912. Its totient is φ = 220962192.

The previous prime is 221054011. The next prime is 221054069. The reversal of 221054051 is 150450122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221054051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221054011) 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, 42221 + ... + 47166.

It is an arithmetic number, because the mean of its divisors is an integer number (55286478).

Almost surely, 2^221054051 is an apocalyptic number.

221054051 is a deficient number, since it is larger than the sum of its proper divisors (91861).

221054051 is an equidigital number, since it uses as much as digits as its factorization.

221054051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91860.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 221054051 is about 14867.8865680365. The cubic root of 221054051 is about 604.6436450703.

The spelling of 221054051 in words is "two hundred twenty-one million, fifty-four thousand, fifty-one".