221354154 has 32 divisors (see below), whose sum is σ = 562170240. Its totient is φ = 63243936.

The previous prime is 221354149. The next prime is 221354171. The reversal of 221354154 is 451453122.

It is a super-2 number, since 2×221354154² = 97995322986111432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292419 + ... + 293174.

It is an arithmetic number, because the mean of its divisors is an integer number (17567820).

Almost surely, 2^221354154 is an apocalyptic number.

221354154 is an abundant number, since it is smaller than the sum of its proper divisors (340816086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221354154 is a wasteful number, since it uses less digits than its factorization.

221354154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585611 (or 585605 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 221354154 is about 14877.9754671125. The cubic root of 221354154 is about 604.9171427635.

The spelling of 221354154 in words is "two hundred twenty-one million, three hundred fifty-four thousand, one hundred fifty-four".