221055051 has 8 divisors (see below), whose sum is σ = 336845824. Its totient is φ = 126317160.

The previous prime is 221055049. The next prime is 221055077. The reversal of 221055051 is 150550122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221055051 - 2¹ = 221055049 is a prime.

It is a super-2 number, since 2×221055051² = 97730671145225202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10526431 = 221055051 / (2 + 2 + 1 + 0 + 5 + 5 + 0 + 5 + 1).

It is not an unprimeable number, because it can be changed into a prime (221055031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5263195 + ... + 5263236.

It is an arithmetic number, because the mean of its divisors is an integer number (42105728).

Almost surely, 2^221055051 is an apocalyptic number.

221055051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221055051 is a deficient number, since it is larger than the sum of its proper divisors (115790773).

221055051 is a wasteful number, since it uses less digits than its factorization.

221055051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10526441.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 221055051 is about 14867.9201975259. The cubic root of 221055051 is about 604.6445568272.

The spelling of 221055051 in words is "two hundred twenty-one million, fifty-five thousand, fifty-one".